CAM 701112

Transanal Endoscopic Microsurgery (TEMS)

Category:Surgery   Last Reviewed:September 2021
Department(s):Medical Affairs   Next Review:September 2022
Original Date:August 2013    

Description
Transanal endoscopic microsurgery (TEMS) is a minimally invasive approach for local excision of rectal lesions that cannot be directly visualized. It is an alternative to open or laparoscopic excision and has been studied in the treatment of both benign and malignant conditions of the rectum.

For individuals who have rectal adenoma(s) who receive TEMS, the evidence includes a few nonrandomized comparative studies and numerous single-arm case series. Relevant outcomes are overall survival, functional outcomes, health status measures, quality of life, and treatment-related morbidity. The evidence supports conclusions that removal of polyps by TEMS is associated with low postoperative complication rates and low risk of recurrence. However, due to the low quality of the evidence base, no conclusions can be made on the comparative efficacy of TEMS and standard procedures. The evidence is insufficient to determine the effects of the technology on health outcomes. 

For individuals who have early rectal adenocarcinomas who receive TEMS, the evidence includes 2 small randomized controlled trials, a few nonrandomized comparative studies, and numerous single-arm case series. Relevant outcomes are overall survival, functional outcomes, health status measures, quality of life, and treatment-related morbidity. The evidence supports conclusions that TEMS is associated with fewer postoperative complications but higher local recurrence rates and possibly higher rates of metastatic disease. There is no demonstrated difference in long-term overall survival in available studies. However, due to the low quality of the evidence base, these conclusions lack certainty. The evidence is insufficient to determine the effects of the technology on health outcomes. 

Based on clinical input supplemented by the outcomes of single-arm series that have shown low complication rates and low recurrence rates of lesions supporting use of TEMS when lesions are not amenable to standard excision, TEMS may be considered medically necessary for excision of rectal adenomas and early carcinomas that cannot be removed by standard approaches when specific criteria are met. These criteria are clinical stage T1 cancers that are located in the middle or upper part of the rectum, are well- or moderately differentiated (G1 or G2) by biopsy, are without lymphadenopathy, and involve less than one-third of the circumference of the rectum.

Background
Transanal Endoscopic Microsurgery
TEMS is a minimally invasive approach to local excision of rectal lesions. It has been used in benign conditions such as large rectal polyps (that cannot be removed through a colonoscope), retrorectal masses, rectal strictures, rectal fistulae, pelvic abscesses, and in malignant conditions (e.g., malignant polyps). Use of TEMS for resection of rectal cancers is more controversial. TEMS can avoid the morbidity and mortality associated with major rectal surgery, including the fecal incontinence related to stretching of the anal sphincter, and can be performed under general or regional anesthesia.

The TEMS system has a specialized magnifying rectoscope with ports for insufflation, instrumentation, and irrigation. This procedure has been available in Europe but has not been widely used in the U.S. Two reasons for this slow adoption are the steep learning curve for the procedure and the limited indications. For example, most rectal polyps can be removed endoscopically, and many rectal cancers need a wide excision and are thus not amenable to local resection.

Other Treatment Options
The most common treatment for rectal cancer is surgery; the technique chosen will depend on several factors. The size and location of the tumor, evidence of local or distal spread, and patient characteristics and goals are all attributes that will affect the treatment approach. Open, wide resections have the highest cure rate but may also have significant adverse events. Most patients find the potential adverse events of lifelong colostomy and/or bowel, bladder, or sexual dysfunction acceptable in the face of a terminal illness. Laparoscopic-assisted surgery, with lymph node dissection as indicated, is technically difficult in the pelvic region but is being investigated as a less invasive alternative to open resection.

Local excision alone does not offer the opportunity for lymph node biopsy and therefore has been reserved for patients in whom the likelihood of cancerous extension is small, local excision can occur under direct visualization in rectal tumors within 10 cm of the anal verge. TEMS extends local excision ability to the proximal rectosigmoid junction. Adenomas, small carcinoid tumors, and nonmalignant conditions (eg, strictures, abscesses) are amenable to local excision by either method.

The use of local excision in rectal adenocarcinoma is an area of much interest and may be most appropriate in small tumors (<4 cm) confined to the submucosa (T1, as defined by the tumor, node, and metastasis staging system). Presurgical clinical staging, however, may miss up to 15% of regional lymph node spread. During local excision, the excised specimen should be examined by a pathologist; if adverse features such as high-grade pathology or unclear margins are observed, the procedure can be converted to a wider resection. Despite this increased risk of local recurrence, local excision may be an informed alternative for patients. TEMS permits local excision beyond the reach of direct visualization equipment.

Regulatory Status 
In 2001, the Transanal Endoscopic Microsurgery (TEMS) Combination System and Instrument Set (Richard Wolf Medical Instruments) was cleared for marketing by the U.S. Food and Drug Administration (FDA) through the 510(k) process. The FDA determined that this device was substantially equivalent to existing devices for use in inflating the rectal cavity, endoscopically visualizing the surgical site, and accommodating up to three surgical instruments. In 2011, the SILS™ Port (Covidien) was cleared for marketing by the FDA through the 510(k) process. The SILS™ Port is a similar instrument that can be used for rectal procedures including TEMS. Another device determined by the FDA to be substantially equivalent to these devices is the GelPOINT® Path (Applied Medical Resources). FDA product codes: HIF, GCJ, FER.

Table 1. Transanal Endoscopic Microsurgery Devices Cleared by the US Food and Drug Administration

Device

Manufacturer

Date Cleared

510(k) No.

Indication

AP50/30 Insufflator with Insuflow Port

Lexion Medical LLC

8/28/2019

K191780

For use in transanal endoscopic microsurgery

AirSeal

ConMed Corporation

3/28/2019

K190303

For use in transanal endoscopic microsurgery

GRI-Alleset Veress Needle

GRI Medical and Electronic Technology Co. Ltd.

6/11/2018

K172835

For use in transanal endoscopic microsurgery

SurgiQuest AIRSEAL iFS System

ConMed Corporation

3/16/2018

K172516

For use in transanal endoscopic microsurgery

TEMED Gas Diffuser

TEMED

2/14/2018

K173545

For use in transanal endoscopic microsurgery

AP 50/30 Insufflator with Insuflow Port

LEXION Medical LLC

11/14/2017

K170799

For use in transanal endoscopic microsurgery

Veress Needle

WickiMed (Huizhou) Medical Equipment Manufacturing Co.Ltd.

9/14/2017

K172120

For use in transanal endoscopic microsurgery

GelPOINT Path Transanal Access Platform

Applied Medical Resources Corp.

7/20/2017

K171701

For use in transanal endoscopic microsurgery

HumiGard Surgical Humidification System HumiGard Humidified Insufflation Kit

FISHER & PAYKEL HEALTHCARE

6/23/2017

K162582

For use in transanal endoscopic microsurgery

LaparoLight Veress Needle

Buffalo Filter LLC

5/18/2017

K171139

For use in transanal endoscopic microsurgery

PNEUMOCLEAR

W.O.M World Of Medicine GmbH

5/15/2017

K170784

For use in transanal endoscopic microsurgery

ENDOFLATOR 40 ENDOFLATOR 50

KARL STORZ ENDOSCOPY-AMERICA INC.

3/2/2017

K161554

For use in transanal endoscopic microsurgery

U-Blade Veress Needle

TIANJIN UWELL MEDICAL DEVICE MANUFACTURING CO.LTD.

12/12/2016

K162648

For use in transanal endoscopic microsurgery

S698 Symbioz flow

SOPRO - ACTEON GROUP

6/17/2016

K153367

For use in transanal endoscopic microsurgery

Insufflator 50L FM134

W.O.M WORLD OF MEDICINE GMBH

3/4/2016

K153513

For use in transanal endoscopic microsurgery

Unimicro Veress Needle

Unimicro Medical Systems (ShenZhen) Co.Ltd.

7/31/2015

K150068

For use in transanal endoscopic microsurgery

SurgiQuest AirSeal iFS System

SURGIQUEST INC.

3/20/2015

K143404

For use in transanal endoscopic microsurgery

GELPOINT PATH TRANSANAL ACCESS PLATFORM

APPLIED MEDICAL RESOURCES CORP.

1/2/2014

K133393

For use in transanal endoscopic microsurgery

Policy
Transanal endoscopic microsurgery may be considered MEDICALLY NECESSARY for treatment of rectal adenomas, including recurrent adenomas that cannot be removed using other means of local excision.

Transanal endoscopic microsurgery may be considered MEDICALLY NECESSARY for treatment of clinical stage T1 rectal adenocarcinomas that cannot be removed using other means of local excision and that meet all of the following criteria:

  • Located in the middle or upper part of the rectum,
  • Well- or moderately-differentiated (G1 or G2) by biopsy,
  • Without lymphadenopathy, and
  • Less than 1/3 the circumference of the rectum.

Transanal endoscopic microsurgery is investigational and/or unproven and therefore considered NOT MEDICALLY NECESSARY for treatment of rectal tumors that do not meet the criteria noted above.

Policy Guidelines
The clinical staging of rectal cancers is determined from the physical examination, imaging, and biopsy results.

See the Codes table for details.

Benefit Application
BlueCard/National Account Issues
Some state or federal mandates (e.g., FEP) prohibit Plans from denying FDA-approved technologies as investigational. In these instances, Plans may have to consider the coverage eligibility of FDA-approved technologies on the basis of medical necessity alone.

Rationale
Evidence reviews assess the clinical evidence to determine whether the use of technology improves the net health outcome. Broadly defined, health outcomes are the length of life, quality of life (QOL), and ability to function¾including benefits and harms. Every clinical condition has specific outcomes that are important to patients and managing the course of that condition. Validated outcome measures are necessary to ascertain whether a condition improves or worsens; and whether the magnitude of that change is clinically significant. The net health outcome is a balance of benefits and harms.

To assess whether the evidence is sufficient to draw conclusions about the net health outcome of technology, two domains are examined: the relevance, and quality and credibility. To be relevant, studies must represent one or more intended clinical use of the technology in the intended population and compare an effective and appropriate alternative at a comparable intensity. For some conditions, the alternative will be supportive care or surveillance. The quality and credibility of the evidence depend on study design and conduct, minimizing bias and confounding that can generate incorrect findings. The randomized controlled trial (RCT) is preferred to assess efficacy; however, in some circumstances, nonrandomized studies may be adequate. RCTs are rarely large enough or long enough to capture less common adverse events and long-term effects. Other types of studies can be used for these purposes and to assess generalizability to broader clinical populations and settings of clinical practice

Transanal Endoscopic Microsurgery
Clinical Context and Therapy Purpose
The purpose of TEMS in patients who have rectal adenoma(s) or early rectal adenocarcinoma is to provide a treatment option that is an alternative to or an improvement on existing therapies.

The question addressed in this evidence review is: Does TEMS improve the net health outcome in patients with rectal adenoma(s) or with early rectal adenocarcinoma?

The following PICO was used to select literature to inform this review.

Populations
The relevant populations of interest is patients with rectal adenoma(s) or with early rectal adenocarcinoma.

Interventions
The therapy being considered is TEMS. TEMS is a form of transanal endoscopic surgery (TES) performed with a rigid operating proctoscope. When a flexible multichannel laparoscopic port is utilized, the transanal endoscopic procedure is known as transanal minimally invasive surgery (TAMIS).

TEMS and TAMIS are performed in an inpatient surgical center, conducted under anesthesia with the specialized equipment needed and surgeons sufficiently experienced with the technology.

Comparators
The following practices are currently being used to treat both rectal adenoma(s) and with early rectal adenocarcinoma: standard transanal excision (TAE) and laparoscopic excision.

Outcomes
The general outcomes of interest are overall survival (OS), tumor recurrence, and treatment-related adverse events (e.g., incontinence, sexual dysfunction).

Follow-up after hospital discharge (24 to 48 hours) takes about 1 to 2 weeks.

Study Selection Criteria
Methodologically credible studies were selected using the following principles:

  • To assess efficacy outcomes, comparative controlled prospective trials were sought, with a preference for RCTs;
  • In the absence of such trials, comparative observational studies were sought, with a preference for prospective studies.
  • To assess long-term outcomes and adverse events, single-arm studies that capture longer periods of follow-up and/or larger populations were sought.
  • Studies with duplicative or overlapping populations were excluded.

Rectal Adenoma(s)
The endoscopic approach to benign or premalignant lesions is similar to that throughout the colon, and studies have focused on the relative safety of the technique. The evidence presented in this section may include adenomas. However, the focus of this research is on the safety of the procedure.

Review of Evidence
Systematic Reviews
Barendse et al. (2011) reported on a systematic review compared TEMS with endoscopic mucosal resection (EMR) for rectal adenomas larger than 2 cm.1 Included in the review were 48 TEMS and 20 EMR studies; all were treated as single-arm studies. No controlled trials were identified that compared TEMS with EMR directly. Early adenoma recurrence rates, within 3 months of the procedure, were 5.4% (95% confidence interval [CI], 4.0% to 7.3%) with TEMS and 11.2% (95% CI, 6.0% to 19.9%) with EMR (P=0.04) in pooled estimates. After 3 months, late adenoma recurrence rates in pooled estimates were 3.0% (95% CI, 1.3% to 6.9%) with TEMS and 1.5% (95% CI, 0.6% to 3.9%) for EMR (P=0.29). Lengths of hospitalization and readmission rates did not differ significantly between procedures. For TEMS, the mean hospital length of stay was 4.4 days and 2.2 days for EMR (P=0.23). Hospital readmission rates were 4.2% for TEMS and 3.5% for EMR (p=0.64). Complication rates after TEMS, for rectal adenomas only, were 13.0% (95% CI, 9.8% to 17.0%) and 3.8% (95% CI, 2.8% to 5.3%) after EMR, for colorectal adenomas (P<0.001). Postoperative complications increased significantly with larger polyp size (P=0.04). However, postoperative complication rates remained higher for TEMS after adjusting for a larger mean polyp size in the TEMS studies (8.7%; 95% CI, 5.8% to 12.7%) than in EMR studies (4.2%; 95% CI, 2.9% to 6.3%; p=0.007). These results would suggest that TEMS may be associated with lower early cancer recurrence than with EMR but late cancer recurrence (after 3 months) may not differ significantly between procedures. Complications were significantly higher with TEMS for rectal adenomas larger than 2 cm. This systematic review was limited by the low quality of the available studies, particularly on the single-arm study evidence base.

Middleton et al. (2005) conducted a systematic review of TEMS based on published results through August 2002.2 Three comparative studies, including an RCT, and 55 case series were included. The first area of study was the safety and efficacy in the removal of adenomas. In the RCT, no difference could be detected in the rate of early complications between TEMS (10.3% of 98 patients) and direct local excision (17% of 90 patients) (relative risk, 0.61; 95% CI, 0.29 to 1.29). TEMS resulted in lower local recurrence (6% [6/98]) than direct local excision (22% [20/90]) (relative risk, 0.28; 95% CI, 0.12 to 0.66). The 6% local recurrence rate for TEMS in this trial is consistent with rates found in the TEMS case series.

Case Series
Numerous case series of TEMS have evaluated the treatment of rectal adenomas; many included mixed populations of patients with benign and malignant lesions.3,4,5,6,7,8,9,10,11,12,13,14,15 Most were retrospective, and a few compared outcomes with other case series of standard excision. These case series offer useful information on the completeness of resection, local recurrence, and complications, but do not provide definitive evidence on the comparative efficacy of this procedure because the comparisons were limited by potential selection bias leading to differences in the patient populations.

Al-Najami et al. (2016) reported on longer-term follow-up for a prospective cohort study of 280 patients with advanced polyps and early rectal cancer treated with TEMS.16 Most patients (n=163 [63%]) had benign disease. Postoperative complications were more frequent in malignant cases (24.0%) than in benign cases (10.8%; p=0.03). A standard follow-up protocol was followed by 83% and 85% of benign and malignant cases, respectively. Over a mean follow-up of 16.4 and 15.2 months in the benign and malignant groups, recurrence rates were 8.3% and 13.5%, respectively.

Long-Term Outcomes
Chan et al. (2020) conducted a retrospective cohort study at a large, single-center institution in Canada to assess long-term recurrence rates following TEMS.17 Consecutive patients (N=297) with pathology-confirmed rectal adenoma treated by transanal endoscopic surgery between May 2007 and September 2016 who had at least 1 y of confirmed endoscopic follow-up were included. Median follow-up was 623 days. A total of 62 recurrences occurred in 41 patients (13.8%). Recurrences were addressed with repeat TEMS or endoscopic resection in 67.7% and 25.8% of cases, respectively. Radical resection for adenocarcinoma was required in 4 patients. Recurrence-free survival rates were 93.4% at 1 year, 86.2% at 2 years, and 73.1% at 5 years. The authors conclude that rectal adenomas managed by TEMS are at high risk for recurrence and surveillance should be performed within the first 2 years and continued through at least 5 years.

Section Summary: Rectal Adenoma(s)
There is a lack of high-quality trials comparing TEMS with standard surgical approaches for the removal of rectal adenomas. The available evidence is primarily from single-arm studies and has reported that TEMS can be performed with relatively low complication rates and low recurrence rates. It is not possible to determine the comparative efficacy of TEMS and other surgical approaches with certainty based on the available evidence. Systematic reviews of nonrandomized comparative studies have concluded that the local recurrence rate with TEMS may be lower than for other procedures, but that short-term complication rates may be higher. The 5-year recurrence-free survival rate for one single-center experience was 73.1%. These conclusions are limited by potential selection bias, leading to differences in the patient populations; in particular, it is possible that patients undergoing TEMS had lower disease severity than patients undergoing standard excision. Therefore, it is not possible to form conclusions about the comparative efficacy of TEMS and alternative approaches.

Rectal Adenocarcinoma
Clinical Context and Therapy Purpose
The purpose of TEMS in patients who have early rectal adenocarcinoma is to provide a treatment option that is an alternative to or an improvement on existing therapies.

The question addressed in this evidence review is: Does TEMS improve the net health outcome in patients with early rectal adenocarcinoma?

The following PICO was used to select literature to inform this review.

Populations
The relevant populations of interest is patients with early rectal adenocarcinoma.

Interventions
The therapy being considered is TEMS. TEMS is a form of transanal endoscopic surgery (TES) performed with a rigid operating proctoscope. When a flexible multichannel laparoscopic port is utilized, the transanal endoscopic procedure is known as transanal minimally invasive surgery (TAMIS).

TEMS and TAMIS are performed in an inpatient surgical center, conducted under anesthesia with the specialized equipment needed and surgeons sufficiently experienced with the technology.

Comparators
The following practices are currently being used to treat early rectal adenocarcinoma: standard TAE and laparoscopic excision, which are performed in an inpatient surgical center, conducted under anesthesia by a surgeon.

Outcomes
The general outcomes of interest are OS, functional outcomes, health status, QOL, tumor recurrence, and treatment-related adverse events (e.g., incontinence, sexual dysfunction).

Follow-up after hospital discharge (24 to 48 hours) takes about 1 to 2 weeks.

Study Selection Criteria

Methodologically credible studies were selected using the following principles:

  • To assess efficacy outcomes, comparative controlled prospective trials were sought, with a preference for RCTs;
  • In the absence of such trials, comparative observational studies were sought, with a preference for prospective studies.
  • To assess long-term outcomes and adverse events, single-arm studies that capture longer periods of follow-up and/or larger populations were sought.
  • Studies with duplicative or overlapping populations were excluded.

Review of Evidence
Systematic Reviews
A meta-analysis by Lu et al. (2015) compared TEMS with total mesorectal excision for T1 rectal cancer.18 Studies selected included 1 RCT and 6 non-RCTs (303 treated with TEMS; 557 treated with total mesorectal excision). For the outcome of postoperative recurrence, the rate of local recurrence was higher after TEMS (odds ratio [OR], 4.63; 95% CI, 2.03 to 10.53; p<0.001, I2=0%). For the 6 studies reporting on OS, there were no significant differences between the TEMS and total mesorectal excision groups (OR=0.87; 95% CI, 0.55 to 1.38; p=0.55, I2=0%).

Clancy et al. (2015) published a systematic review of the comparative efficacy of TEMS and standard TAE for early rectal cancer.19 Six studies including outcomes for 927 excisions were selected, all of which were nonrandomized. On combined analysis, TEMS had a higher rate of negative surgical margins (OR=5.3; 95% CI 3.2 to 8.7) and a lower rate of recurrence (OR=0.25; 95% CI, 0.15 to 0.40) compared with standard excision. Complication rates did not differ significantly between techniques (OR=1.018; 95% CI, 0.658 to 1.575).

Sajid et al. (2014) reported on a systematic review and meta-analysis of TEMS and radical resection for stage T1 and T2 rectal cancers.20 Included in the review were 5 RCTs and 5 cohort studies (445 TEMS patients, 438 radical resection patients). In random-effects models, there was a greater risk of local recurrence with TEMS than with radical resection (OR=2.78; 95% CI, 1.42 to 5.44; p<0.003) and a greater risk of overall recurrence (OR=2.01; 95% CI, 1.18 to 3.42; p<0.01). The risk of distant recurrence did not differ significantly between procedures (OR=0.87; 95% CI, 0.41 to 1.83; p=0.71) nor did OS rates (OR=0.90; 95% CI, 0.49 to 1.66; p=0.74). In a subgroup analysis of the 5 RCTs, the risk of overall recurrence remained higher with TEMS (OR=2.21; 95% CI, 1.10 to 4.41; p<0.03). OS rates, however, did not differ significantly between TEMS and radical resection (OR=0.80; 95% CI 0.43 to 1.47; p=0.47), and postoperative complications were significantly lower with TEMS (OR=0.19; 95% CI, 0.08 to 0.44; p<0.001).

Wu et al. (2011) published a meta-analysis on TEMS and conventional surgery for stage T1 rectal cancers.21 Five studies were selected, including a prospective RCT and 4 retrospective, nonrandomized studies for a total of 397 (216 TEMS, 181 conventional rectal surgery) patients. Combined analyses were performed for mortality, postoperative complications, recurrence rates, and 5 year survival. No deaths were reported from either procedure, and TEMS had fewer postoperative complications (16/196) than conventional surgery (77/163). On combined analysis, the odds for complications was 0.10 (95% CI, 0.05 to 0.18). There was a higher rate of local recurrence or distant metastasis at a 40-month follow-up for TEMS (12% [26/216]) than for conventional radical surgery (0.5% [1/181]). On combined analysis, the odds for recurrence in the conventional surgery group was 8.64 (95% CI, 2.63 to 28.39). The 5-year survival (not specified as disease-specific or overall), as reported in 4 studies, did not differ significantly between groups (80.1% [157/196] for TEMS vs 81% [132/163] for conventional surgery). These results supported the conclusion that TEMS is associated with fewer early complications but higher rates of recurrence than standard resection, with no demonstrable differences in OS.

Sgourakis et al. (2011) conducted a meta-analysis of stage T1 and T2 rectal cancer treatment that compared TEMS with standard resection and TAE.22 Eleven studies were selected for analysis and included 3 randomized controlled, 1 prospective, and 7 retrospective trials (total n=1191 patients; 514 TEMS, 291 standard resections, 386 TAE). Numerous combined analyses were performed to measure mortality, complications, and recurrence rates. For postoperative complication rates, the combined analysis showed a significantly lower rate of major complications for TEMS than for standard resection (OR=0.24; 95% CI, 0.07 to 0.91). Minor complications did not differ significantly between groups. Overall postoperative complications did not differ significantly between TEMS and TAE when stage T1 and T2 tumor data were pooled. Follow-up for all studies was a mean or median of more than 30 months (except for follow-up >20 months in 1 treatment arm in 2 studies). For T1 tumors, local recurrence was significantly higher for the TEMS group than for the standard resection group (OR=4.92; 95% CI, 1.81 to 13.41), as was overall recurrence (OR=2.03; 95% CI, 1.15 to 3.57). Distant metastasis (OR=1.05; 95% CI, 0.47 to 2.39) and OS (OR=1.14; 95% CI, 0.55 to 2.34) did not differ significantly between groups. Results were similar when data were analyzed for T1 and T2 tumors, except that disease-free survival was significantly longer with TEMS than with TAE. There was less evidence for T2 tumors, and conclusions for that group of patients were less clear. The results of this review also supported conclusions that TEMS is associated with fewer postoperative complications than standard resection, higher local and distant recurrence rates, and no differences in the long-term OS.

Doornebosch et al. (2009) discussed weaknesses in the evidence and unresolved issues about the role of TEMS.23 Reviewers posed 3 questions: “First, is there enough evidence to propagate LE (local excision) as a curative option in selected (T1) rectal carcinomas? Second, if LE is justified, which technique should be the method of choice? Third, can we adequately identify, pre- and postoperatively, tumors suitable for LE?” They noted that selection bias in studies complicated answering the first question; and a significant portion of tumors recurred in all studies using various techniques for LE (including TEMS), although it seemed not to influence survival rates. Reviewers noted that the published case series reporting outcomes after TEMS for T1 rectal carcinomas used inclusion criteria that were not always clear and used salvage procedures that could introduce bias. TEMS was demonstrated to be a safe procedure in all series; complication rates varied between 5% and 26%, and complications were generally minor. Local recurrence rates for TEMS varied between 4% and 33% in the studies reviewed. On the third question, reviewers assessed whether high recurrence rates could be improved by better tumor selection. They noted that TEMS had been incorporated into surgical practice based largely on retrospective case series, and noted that, despite the lack of level I evidence, its use seemed justified in well-selected T1 rectal cancers. They also indicated that some view TEMS as an alternative for patients with T1 lesions who are currently undergoing other methods of LE (e.g., using the Parks technique instead of radical surgery).

Table 2. Comparison of Trials/Studies Included in SR & M-As for Adenocarcinoma

Study Clancy (2015)19, Sajid (2014)20, Sgourakis (2011)22,
Han (2012)    
De Graaf (2011)  
Christoforidis (2009)  
Lebedyev (2009)  
Moore (2008)  
Langer (2003)    
Allaix (2012)    
Chen (2013)    
Heintz (1997)    
Langer (2002)    
Lee (2002)    
Lezoche (2007)    
Lezoche (2012)    
Palma (2009)  
Winde (1996)  
Lezoche (2008)    
Langer (2003)    
Heintz (1998)    
Lee (2003)    
De Graaf (2009)    
Dixon (2006)    

MA: meta-analysis; SR: systematic reviews.

Table 3. SR & M-A Characteristics for Adenocarcinoma

Study Dates Trials Participants1 N (Range) Design Duration
Clancy (2015)19 2003-2012 6 Patients with rectal lesions treated with TEM or transanal excision 927 excisions (NR) Retrospective and prospective NR
Sajid (2014)20 1996-2013 10 Patients with rectal cancer undergoing TEM with RR 883 (NR) RCT NR
Sgourakis (2011)22 1996-2009 11 Patients with stage I rectal cancer 1191 (NR) RCT NR

MA: meta-analysis; NR: not reported; RCT: randomized controlled trial; RR: radical resection; SR: systematic reviews; TEM: transanal endoscopic microsurgery.

Table 4. SR & M-A Results for Adenocarcinoma

Study Post-Operative Complication Rate Recurrence Rate
Clancy (2015)19    
OR 1.018 0.248
95% CI 0.658–1.575 0.154–0.401
P-value 0.937 <0.001
Sajid (2014)20    
OR 0.19 2.78
95% CI 0.08–0.44 1.42–5.44
P-value <0.001 <0.003
Sgourakis (2011)22    
OR 0.16 2.03
95% CI 0.06–0.38 1.15–3.57

CI: confidence interval; MA: meta-analysis; OR: odds ratio; SR: systematic review.

Randomized Controlled Trials
E. Lezoche et al. (2012) published an RCT of 100 patients with T2 rectal cancers without evidence of lymph node or distant metastasis randomized to TEMS or laparoscopic total mesorectal excision.24 All patients also received neoadjuvant chemoradiation before surgery. All patients in the TEMS group completed the procedure. With laparoscopic resection, 5 (10%) patients required conversion to open surgery (p=0.028), and 23 patients required a stoma. Postoperative complications did not differ significantly between groups. Disease-free survival also did not differ significantly between groups (p=0.686) at a median follow-up of 9.6 years (range, 4.7-12.3 years for laparoscopic resection; range, 5.5-12.4 years for TEMS). Local recurrence or metastases occurred in 6 TEMS patients and 5 laparoscopic patients.

G. Lezoche et al. (2008) reported on a similar RCT evaluating of 70 subjects with stage T2 rectal cancer without evidence of lymph node or distant metastasis on imaging.25 Patients were randomized to TEMS or laparoscopic resection via total mesorectal excision. All patients received chemoradiation before surgery. Median follow-up was 84 months (range, 72-96 months). Two (5.7%) local recurrences were observed after TEMS and 1 (2.8%) after laparoscopic resection. Distant metastases occurred in 1 patient in each group. The probability of survival from rectal cancer was 94% for both groups. Overlap of patients studied in the 2008 and 2012 trials could not be determined.

Table 5. Summary of Key RCT Characteristics for Adenocarcinoma

Study; Trial Countries Sites Dates Participants Interventions
          Active Comparator
Lezoche 24(2012) Italy 1 1997-2004 Patients with T2 rectal cancers TEM (n=50) Laparoscopic total mesorectal excision (n=50)
Lezoche (2008)25 Italy 1 NR Patients with T2 rectal cancers TEM (n=35) Laparoscopic resection via total mesorectal excision (n=35)

NR: not reported; RCT: randomized controlled trial; TEM: transanal endoscopic microsurgery.

Table 6. Summary of Key RCT Results for Adenocarcinoma

Study Local Recurrence Distant Metastases Probability of Survival Disease-Free Survival
Lezoche (2012)24       No significant difference between groups (p=0.686)
TEM 4 (8%) 2 (4%)    
LR 3 (6%) 2 (4%)    
Lezoche (2008)25        
TEM 2 (5.7%) 1 (2.8%) 94%  
LR 1 (2.8%) 1 (2.8%) 94%  

LR: laparoscopic resection; RCT: randomized controlled trial.

The purpose of the limitations tables (see Tables 7 and 8) is to display notable limitations identified in each study. This information is synthesized as a summary of the body of evidence following each table and provides the conclusions on the sufficiency of the evidence supporting the position statement.

Table 7. Study Relevance Limitations

Study Populationa Interventionb Comparatorc Outcomesd Follow-Upe
Lezoche (2012)24       3. No CONSORT reporting of harms  
Lezoche (2008)25       3. No CONSORT reporting of harms  

The study limitations stated in this table are those notable in the current review; this is not a comprehensive gaps assessment.
Population key: 1. Intended use population unclear; 2. Clinical context is unclear; 3. Study population is unclear; 4. Study population not representative of intended use.
Intervention key: 1. Not clearly defined; 2. Version used unclear; 3. Delivery not similar intensity as comparator; 4. Not the intervention of interest.
c  Comparator key: 1. Not clearly defined; 2. Not standard or optimal; 3. Delivery not similar intensity as intervention; 4. Not delivered effectively.
d  Outcomes key: 1. Key health outcomes not addressed; 2. Physiologic measures, not validated surrogates; 3. No CONSORT reporting of harms; 4. Not establish and validated measurements; 5. Clinical significant difference not prespecified; 6. Clinical significant difference not supported.
e  Follow-Up key: 1. Not sufficient duration for benefit; 2. Not sufficient duration for harms.

Table 8. Study Design and Conduct Limitations

Study Allocationa Blindingb Selective Reportingc Follow-Upd Powere Statisticalf
Lezoche (2012)   1,2,3. Blinding unclear     1. Some power calculations not reported  
Lezoche (2008)25 3. Allocation concealment unclear 1,2,3. Blinding unclear     1. Some power calculations not reported  

The study limitations stated in this table are those notable in the current review; this is not a comprehensive gaps assessment.
Allocation key: 1. Participants not randomly allocated; 2. Allocation not concealed; 3. Allocation concealment unclear; 4. Inadequate control for selection bias.
Blinding key: 1. Not blinded to treatment assignment; 2. Not blinded outcome assessment; 3. Outcome assessed by treating physician.
c  Selective Reporting key: 1. Not registered; 2. Evidence of selective reporting; 3. Evidence of selective publication.
d  Follow-Up key: 1. High loss to follow-up or missing data; 2. Inadequate handling of missing data; 3. High number of crossovers; 4. Inadequate handling of crossovers; 5. Inappropriate exclusions; 6. Not intent to treat analysis (per protocol for noninferiority trials).
e  Power key: 1. Power calculations not reported; 2. Power not calculated for primary outcome; 3. Power not based on clinically important difference.
f  Statistical key: 1. Intervention is not appropriate for outcome type: (a) continuous; (b) binary; (c) time to event; 2. Intervention is not appropriate for multiple observations per patient; 3. Confidence intervals and/or p values not reported; 4. Comparative treatment effects not calculated.

Case Series
A large number of case series and retrospective nonrandomized comparative reviews have been published.3,4,5,6,7,8,9,10,11,12,13 The case series offers useful information on the completeness of resection, local recurrence, and complications, but does not provide definitive evidence on the comparative efficacy of TEMS because the comparisons were limited by potential selection bias leading to differences in patient characteristics.

Much of the research has focused on the technical aspects of TEMS and on other, non-neoplastic applications. Other studies have investigated the use of TEMS with adjuvant therapy or additional techniques. For example, Walega et al (2010) reported on a small study that added endoscopic mesorectum resection to TEMS.26

Moore et al. (2008) retrospectively reviewed patients who underwent TAE for rectal neoplasms and compared results for traditional transanal resection with TEMS.27 Of 296 patients identified, 76 were excluded because of surgery due to abscesses, fistulas, inflammatory bowel disease, or multiple lesions. Forty-nine patients were excluded because of incomplete or missing charts. Records of 171 patients were analyzed; 82 patients who underwent TEMS and 89 who had a transanal resection. For patients who received TEMS, those with stage T1 lesions without adverse histologic features (poor differentiation, lymphovascular invasion) received local excision alone. Patients with T1 lesions with adverse features or T2 lesions received postoperative chemoradiation. local excision was performed for T3 lesions only in high-risk patients or those who refused radical resection. In the TEMS group, there were 40 polyps, 5 carcinoma in situ, 21 T1 lesions, 7 T2 lesions, 8 T3 lesions, no indeterminate lesions, and 1 carcinoid lesion; in the transanal resection group, there were: 38 polyps, 4 carcinoma in situ, 20 T1 lesions, 19 T2 lesions, 6 T3 lesions, 1 indeterminate lesion, and 1 carcinoid lesion. There were 12 (15%) postoperative complications (4 major) in the TEMS group and 15 (17%) complications in the transanal resection group (6 major). In the TEMS group, 90% had negative tumor margins, and none had indeterminate margins vs 71% negative and 15% indeterminate margins in the transanal resection patients. Local recurrence was less frequent after TEMS (4%) than after transanal resection (24%; p=0.004). The difference between groups in distant recurrence was not statistically significant. Three TEMS patients with malignant lesions underwent radical resection and were excluded from recurrence analyses. The recurrence rate among cancer patients did not differ statistically between groups. For patients with adenomas, the overall recurrence rate after TEMS was 3% and 32% for transanal resection. In patients with polyps, clear margins were achieved more frequently after TEMS (83%) than after transanal resection (61%).

A number of studies identified have raised questions about disease recurrence after TEMS for stage T1 rectal cancer.28,29,30 For example, Doornebosch et al. (2010) reported on TEMS for 88 patients, 18 (20.5%) of whom had a local recurrence.28 Of them, 16 patients had salvage surgery. At the 3-year follow-up, the OS rate was 31%, and the cancer-related survival rate was 58%. Authors concluded that further tailoring patient and tumor selection before a decision for LE might improve survival.

In an editorial accompanying this study, Friel (2010) commented on the use of LE in the treatment of T1 rectal lesions.31 He noted that the reported recurrence rate should raise concerns and calls for additional studies of recurrence with LE to verify the Doornebosch et al (2010) findings. Friel (2010) also noted that LE must still be considered as an oncologic compromise between lower surgical morbidity but higher disease recurrence and that, once fully informed, patients may find this compromise acceptable.

Long-Term Outcomes
van Heinsbergen et al. (2020) conducted a study to assess the development of low anterior resection syndrome (LARS) and its impact on quality of life (QOL) following TEMS.32 Patients with T1 or T2 rectal cancer who underwent TEMS in a single-center in the Netherlands between January 2008 and December 2013 were included (N=73). Bowel dysfunction was assessed by the LARS-Score and QOL was assessed by the European Organization for the Research and Treatment of Cancer QLQ-C30 and -CR-29 questionnaires. Responses from 55 patients (75.3%) were available for analysis. At follow-up, the median interval post-intervention was 4.3 y (range, 2.5 to 8.0) with a median patient age of 72 y (range, 49 to 86). Major and minor LARS were observed in 29% and 26% of patients, respectively. Female gender (OR 4.00; 95% CI, 1.20 to 13.36), neo-adjuvant chemoradiotherapy (OR 3.63; 95% CI, 1.08 to 12.17) and specimen thickness (OR 1.10 for each mm increase in thickness; 95% CI, 1.01 to 1.20) were associated with the development of major LARS. Patients with major LARS demonstrated significantly higher symptom burden on nausea and vomiting, pain, insomnia, diarrhea, and other colorectal-specific QOL domains.

Section Summary: Rectal Adenocarcinoma
The evidence on the use of TEMS for rectal adenocarcinoma consists of a limited number of RCTs, nonrandomized studies, and numerous case series. Two RCTs have compared TEMS with laparoscopic excision, rather than to standard TAE, and might have included overlapping populations. This evidence generally supports the conclusion that TEMS may be associated with lower complication rates than other surgical approaches but that local recurrence rates may be higher with TEMS. However, at least 1 RCT has reported that the complication rates with TEMS did not differ from those for laparoscopic resection. No differences in OS rates have been reported for TEMS vs other approaches. Overall, this evidence has demonstrated that TEMS has efficacy in treating early rectal cancer, but the evidence base is not sufficient to determine the comparative efficacy of TEMS and alternative techniques.

Summary of Evidence
For individuals who have rectal adenoma(s) who receive TEMS, the evidence includes a few nonrandomized comparative studies and numerous single-arm case series. Relevant outcomes are overall survival, functional outcomes, health status measures, quality of life, and treatment-related morbidity. The evidence supports conclusions that the removal of polyps by TEMS is associated with low postoperative complication rates and low-risk of recurrence. However, due to the low quality of the evidence base, no conclusions can be made on the comparative efficacy of TEMS and standard procedures. The evidence is insufficient to determine the effects of the technology on health outcomes.

For individuals who have early rectal adenocarcinoma who receive TEMS, the evidence includes 2 small randomized controlled trials, a few nonrandomized comparative studies, and numerous single-arm case series. Relevant outcomes are overall survival, functional outcomes, health status measures, quality of life, and treatment-related morbidity. The evidence supports conclusions that TEMS is associated with fewer postoperative complications but higher local recurrence rates and possibly higher rates of metastatic disease. There is no demonstrated difference in long-term overall survival with TEMS in available studies. However, due to the low quality of the evidence base, these conclusions lack certainty. The evidence is insufficient to determine the effects of the technology on health outcomes. 

Clinical Input From Physician Specialty Societies and Academic Medical Centers
While the various physician specialty societies and academic medical centers may collaborate with and make recommendations during this process, through the provision of appropriate reviewers, input received does not represent an endorsement or position statement by the physician specialty societies or academic medical centers, unless otherwise noted.

2009 Input
In response to requests, input was received from 2 academic medical centers while this policy was under review in 2009. Input supported the policy statements adopted in 2009. One reviewer commented specifically that this technique should be limited to select T1 rectal cancers.

Practice Guidelines and Position Statements
National Comprehensive Cancer Network
The National Comprehensive Cancer Network (v.6.2020) in its updated guidelines on the treatment of rectal cancer states, “When the lesion can be adequately localized to the rectum, local excision of more proximal lesions may be technically feasible using advanced techniques, such as transanal microscopic surgery or transanal minimally invasive surgery (TAMIS).”33

However, under discussion is the statement, “TEM can facilitate excision of small tumors through the anus when lesions can be adequately identified in the rectum. TEM may be technically feasible for more proximal lesions.”

National Cancer Institute
In 2020, the National Cancer Institute (NCI) guidelines on treatment of rectal cancer indicated the management of rectal cancer is multimodal and involves a multidisciplinary team of cancer specialists with expertise in gastroenterology, medical oncology, surgical oncology, radiation oncology, and radiology.34 Based on the increased risk of local recurrence and poor overall prognosis, management of rectal cancer diverges from colon cancer. The differences include surgical technique, use of radiotherapy, and method of chemotherapy administration. Additional issues are maintenance or restoration of the normal anal sphincter and genitourinary function. The NCI recommends as a primary treatment for patients with rectal cancer surgical resection of the primary tumor. The NCI guidance specific to this evidence review includes “… Transanal local excision and transanal endoscopic microsurgery for select clinically staged T1/T2 N0 rectal cancers."

American Society of Colon and Rectal Surgeons
In 2013, the American Society of Colon and Rectal Surgeons updated its 2010 practice parameters for the management of rectal cancer.35 The 2013 guidelines indicated that curative local excision is an appropriate treatment modality for carefully selected, well to moderately differentiated T1 rectal cancers. Tumor size must be less than 3 cm in diameter and less than one-third of the bowel lumen circumference. Additionally, patients must not have a lymphovascular or perineural invasion. The guidelines noted that visualization with TEMS appears to be superior to the transanal approach, but randomized controlled trials are lacking. T2 lesions should be treated with radical mesenteric excision unless the patient is a poor candidate for a more extensive surgical procedure.

American College of Radiology
In 2015, the American College of Radiology (ACR) updated its 2010 appropriateness criteria on local excision of early-stage rectal cancer.36,37 The ACR noted that TEMS is an appropriate operative procedure for locally complete excision of distal rectal lesions and has been “evaluated for curative treatment of invasive cancer.” ACR also noted that TEMS has “been shown to be as effective, and associated with less morbidity than conventional transanal excision” and is considered safe after treatment with chemoradiation. These ACR guidelines were based on expert consensus and analysis of current literature.

U.S. Preventive Services Task Force Recommendations
Not applicable.

Ongoing and Unpublished Clinical Trials
Some currently ongoing and unpublished trials that might influence this review are listed in Table 9.

Table 9. Summary of Key Trials

NCT No. Trial Name Planned Enrollment Completion Date
Ongoing      
NCT02885142 Early Rectal Cancer: Endoscopic Submucosal Dissection or Transanal Endoscopic Microsurgery? (MUCEM) 400 Nov 2020
(not yet recruiting)
NCT01308190

Prospective Randomized Clinical Trial for no Inferiority With Preoperative Chemoradiotherapy and Transanal Endoscopic Microsurgery (TEM) Versus Total Mesorectal Excision in T2-T3s N0, M0 Rectal Cancer 173

Jul 2021
(recruiting)
NCT03718351 Randomized Controlled Trial of Endoscopic Submucosal Dissection Versus Transanal Endoscopic Microsurgery For Early Rectal Neoplasms And Large Rectal Adenomas: Comparison of Treatment Efficacy And Safety 236 Sep 2021
(recruiting)
NCT02945566

Can the Rectum be Saved by Watchful Waiting or TransAnal Surgery Following (Chemo) Radiotherapy Versus Total Mesorectal Excision for Early REctal Cancer? (STAR-TREC)

120

Oct 2021
(recruiting)
Unpublished      
NCT01023984 Transanal Endoscopic Microsurgery Versus Endoscopic Submucosal Dissection For Large Rectal Adenomas (TEMENDO) 120 Dec 2019
(suspended; scarce interest)

NCT: national clinical trial.
a  Denotes industry-sponsored or cosponsored trial.

References 

  1. Barendse RM, van den Broek FJ, Dekker E, et al. Systematic review of endoscopic mucosal resection versus transanal endoscopic microsurgery for large rectal adenomas. Endoscopy. Nov 2011; 43(11): 941-9. PMID 21971923
  2. Middleton PF, Sutherland LM, Maddern GJ. Transanal endoscopic microsurgery: a systematic review. Dis Colon Rectum. Feb 2005; 48(2): 270-84. PMID 15711865
  3. Restivo A, Zorcolo L, D'Alia G, et al. Risk of complications and long-term functional alterations after local excision of rectal tumors with transanal endoscopic microsurgery (TEM). Int J Colorectal Dis. Feb 2016; 31(2): 257-66. PMID 26298182
  4. Issa N, Murninkas A, Schmilovitz-Weiss H, et al. Transanal Endoscopic Microsurgery After Neoadjuvant Chemoradiotherapy for Rectal Cancer. J Laparoendosc Adv Surg Tech A. Aug 2015; 25(8): 617-24. PMID 26258267
  5. Verseveld M, Barendse RM, Gosselink MP, et al. Transanal minimally invasive surgery: impact on quality of life and functional outcome. Surg Endosc. Mar 2016; 30(3): 1184-7. PMID 26139488
  6. D'Ambrosio G, Paganini AM, Balla A, et al. Quality of life in non-early rectal cancer treated by neoadjuvant radio-chemotherapy and endoluminal loco-regional resection (ELRR) by transanal endoscopic microsurgery (TEM) versus laparoscopic total mesorectal excision. Surg Endosc. Feb 2016; 30(2): 504-511. PMID 26045097
  7. Verseveld M, de Graaf EJ, Verhoef C, et al. Chemoradiation therapy for rectal cancer in the distal rectum followed by organ-sparing transanal endoscopic microsurgery (CARTS study). Br J Surg. Jun 2015; 102(7): 853-60. PMID 25847025
  8. Laliberte AS, Lebrun A, Drolet S, et al. Transanal endoscopic microsurgery as an outpatient procedure is feasible and safe. Surg Endosc. Dec 2015; 29(12): 3454-9. PMID 25801107
  9. Samalavicius N, Ambrazevicius M, Kilius A, et al. Transanal endoscopic microsurgery for early rectal cancer: single center experience. Wideochir Inne Tech Maloinwazyjne. Dec 2014; 9(4): 603-7. PMID 25561999
  10. Mora Lopez L, Serra Aracil X, Hermoso Bosch J, et al. Study of anorectal function after transanal endoscopic surgery. Int J Surg. Jan 2015; 13: 142-147. PMID 25486265
  11. Hompes R, Ashraf SQ, Gosselink MP, et al. Evaluation of quality of life and function at 1 year after transanal endoscopic microsurgery. Colorectal Dis. Feb 2015; 17(2): O54-61. PMID 25476189
  12. Stipa F, Picchio M, Burza A, et al. Long-term outcome of local excision after preoperative chemoradiation for ypT0 rectal cancer. Dis Colon Rectum. Nov 2014; 57(11): 1245-52. PMID 25285690
  13. Verseveld M, Barendse RM, Dawson I, et al. Intramucosal carcinoma of the rectum can be safely treated with transanal endoscopic microsurgery; clinical support of the revised Vienna classification. Surg Endosc. Nov 2014; 28(11): 3210-5. PMID 24939156
  14. Zacharakis E, Freilich S, Rekhraj S, et al. Transanal endoscopic microsurgery for rectal tumors: the St. Mary's experience. Am J Surg. Nov 2007; 194(5): 694-8. PMID 17936438
  15. Cataldo PA. Transanal endoscopic microsurgery. Surg Clin North Am. Aug 2006; 86(4): 915-25. PMID 16905416
  16. Al-Najami I, Rancinger CP, Larsen MK, et al. Transanal endoscopic microsurgery for advanced polyps and early cancers in the rectum-Long-term outcome: A STROBE compliant observational study. Medicine (Baltimore). Sep 2016; 95(36): e4732. PMID 27603369
  17. Chan T, Karimuddin AA, Raval MJ, et al. Predictors of rectal adenoma recurrence following transanal endoscopic surgery: a retrospective cohort study. Surg Endosc. Aug 2020; 34(8): 3398-3407. PMID 31512037
  18. Lu JY, Lin GL, Qiu HZ, et al. Comparison of Transanal Endoscopic Microsurgery and Total Mesorectal Excision in the Treatment of T1 Rectal Cancer: A Meta-Analysis. PLoS One. 2015; 10(10): e0141427. PMID 26505895
  19. Clancy C, Burke JP, Albert MR, et al. Transanal endoscopic microsurgery versus standard transanal excision for the removal of rectal neoplasms: a systematic review and meta-analysis. Dis Colon Rectum. Feb 2015; 58(2): 254-61. PMID 25585086
  20. Sajid MS, Farag S, Leung P, et al. Systematic review and meta-analysis of published trials comparing the effectiveness of transanal endoscopic microsurgery and radical resection in the management of early rectal cancer. Colorectal Dis. Jan 2014; 16(1): 2-14. PMID 24330432
  21. Wu Y, Wu YY, Li S, et al. TEM and conventional rectal surgery for T1 rectal cancer: a meta-analysis. Hepatogastroenterology. Mar-Apr 2011; 58(106): 364-8. PMID 21661397
  22. Sgourakis G, Lanitis S, Gockel I, et al. Transanal endoscopic microsurgery for T1 and T2 rectal cancers: a meta-analysis and meta-regression analysis of outcomes. Am Surg. Jun 2011; 77(6): 761-72. PMID 21679648
  23. Doornebosch PG, Tollenaar RA, De Graaf EJ. Is the increasing role of Transanal Endoscopic Microsurgery in curation for T1 rectal cancer justified? A systematic review. Acta Oncol. 2009; 48(3): 343-53. PMID 18855161
  24. Lezoche E, Baldarelli M, Lezoche G, et al. Randomized clinical trial of endoluminal locoregional resection versus laparoscopic total mesorectal excision for T2 rectal cancer after neoadjuvant therapy. Br J Surg. Sep 2012; 99(9): 1211-8. PMID 22864880
  25. Lezoche G, Baldarelli M, Guerrieri M, et al. A prospective randomized study with a 5-year minimum follow-up evaluation of transanal endoscopic microsurgery versus laparoscopic total mesorectal excision after neoadjuvant therapy. Surg Endosc. Feb 2008; 22(2): 352-8. PMID 17943364
  26. Walega P, Kenig J, Richter P, et al. Functional and clinical results of transanal endoscopic microsurgery combined with endoscopic posterior mesorectum resection for the treatment of patients with t1 rectal cancer. World J Surg. Jul 2010; 34(7): 1604-8. PMID 20174804
  27. Moore JS, Cataldo PA, Osler T, et al. Transanal endoscopic microsurgery is more effective than traditional transanal excision for resection of rectal masses. Dis Colon Rectum. Jul 2008; 51(7): 1026-30; discussion 1030-1. PMID 18481147
  28. Doornebosch PG, Ferenschild FT, de Wilt JH, et al. Treatment of recurrence after transanal endoscopic microsurgery (TEM) for T1 rectal cancer. Dis Colon Rectum. Sep 2010; 53(9): 1234-9. PMID 20706065
  29. Tsai BM, Finne CO, Nordenstam JF, et al. Transanal endoscopic microsurgery resection of rectal tumors: outcomes and recommendations. Dis Colon Rectum. Jan 2010; 53(1): 16-23. PMID 20010345
  30. Allaix ME, Arezzo A, Caldart M, et al. Transanal endoscopic microsurgery for rectal neoplasms: experience of 300 consecutive cases. Dis Colon Rectum. Nov 2009; 52(11): 1831-6. PMID 19966628
  31. Friel CM. Local excision of T1 rectal cancer: where are we now?. Dis Colon Rectum. Sep 2010; 53(9): 1231-3. PMID 20706064
  32. van Heinsbergen M, Leijtens JW, Slooter GD, et al. Quality of Life and Bowel Dysfunction after Transanal Endoscopic Microsurgery for Rectal Cancer: One Third of Patients Experience Major Low Anterior Resection Syndrome. Dig Surg. 2020; 37(1): 39-46. PMID 31185474
  33. National Comprehensive Cancer Network (NCCN). NCCN Clinical Practice Guidelines in Oncology: Rectal Cancer. Version 6.2020. https://www.nccn.org/professionals/physician_gls/pdf/rectal.pdf. Accessed October 12, 2020.
  34. National Cancer Institute (NCI). Rectal Cancer Treatment (PDQ). Healthcare Provider Version. https://www.cancer.gov/types/colorectal/hp/rectal-treatment-pdq#_43. Updated August 3, 2020. Accessed October 12, 2020.
  35. Monson JR, Weiser MR, Buie WD, et al. Practice parameters for the management of rectal cancer (revised). Dis Colon Rectum. May 2013; 56(5): 535-50. PMID 23575392
  36. Blackstock W, Russo SM, Suh WW, et al. ACR Appropriateness Criteria: local excision in early-stage rectal cancer. Curr Probl Cancer. May-Jun 2010; 34(3): 193-200. PMID 20541057
  37. Russo S, Blackstock AW, Herman JM, et al. ACR Appropriateness Criteria(R) Local Excision in Early Stage Rectal Cancer. Am J Clin Oncol. Oct 2015; 38(5): 520-5. PMID 26371522 

Coding Section

Codes

Number

Description

CPT

0184T

Excision of rectal tumor, transanal endoscopic microsurgical approach (ie, TEMS), including muscularis propria (ie, full thickness)

ICD-10-CM

C20

Malignant neoplasm of rectum

 

D12.8

Benign neoplasm of rectum

ICD-10-PCS

 

ICD-10-PCS codes are only used for inpatient services

 

0DBP8ZZ

Surgical, gastrointestinal system, excision, rectum, via natural or artificial opening endoscopic

Type of Service

Surgery

 

Place of Service

Inpatient/Outpatient

 

Procedure and diagnosis codes on Medical Policy documents are included only as a general reference tool for each policy. They may not be all-inclusive.

This medical policy was developed through consideration of peer-reviewed medical literature generally recognized by the relevant medical community, U.S. FDA approval status, nationally accepted standards of medical practice and accepted standards of medical practice in this community, Blue Cross Blue Shield Association technology assessment program (TEC) and other non-affiliated technology evaluation centers, reference to federal regulations, other plan medical policies, and accredited national guidelines.

"Current Procedural Terminology © American Medical Association.  All Rights Reserved" 

History From 2014 Forward     

09/01/2021 

Annual review, no change to policy intent. Updating rationale and references. 

09/01/2020 

Annual review, no change to policy intent. Updating background, regulatory status, guidelines, coding, rationale and references. 

09/01/2019 

Annual review, no change to policy intent. Updating rationale.

09/04/2018 

Annual review, no change to policy intent. Updating rationale. 

09/13/2017 

Annual review, no change to policy intent. Updating background, description, regulatory status, rationale and references. 

09/01/2016 

Annual review, no change to policy intent. 

09/29/2015 

Annual review, no change to policy intent. Updating background, description, rationale and references. Adding guidelines and coding.

08/04/2014

Annual review. Updated rationale and references. No change to policy intent.


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