Evidence map›Paper›PMID 35346146›Full record

ArticleBMC surgery2022

Comparison of advanced techniques for local excision of rectal lesions: a case series.

Marisa E Schwab, Sophia Hernandez, Sarah Watanaskul, Hueylan Chern, Madhulika Varma, Ankit Sarin

Open access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in BMC surgery, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed, 2 pooled it
0.7field-weighted citation impact, top 29% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed, 2 syntheses or guidelines pooled it, 8 citations in OpenAlex.

  1. Robotic surgery (R-TAMIS): a systematic review.Journal of robotic surgery · 2026
    Pooled it
  2. Pooled it
  3. Article
  4. Article
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  6. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Marisa E SchwabDepartment of Surgery, University of California San Francisco, San Francisco, CA, USA. marisa.schwab@ucsf.edu.
Sophia HernandezDepartment of Surgery, University of California San Francisco, San Francisco, CA, USA.
Sarah WatanaskulSchool of Medicine, University of California San Francisco, San Francisco, CA, USA.
Hueylan ChernDepartment of Surgery, University of California San Francisco, San Francisco, CA, USA.
Madhulika VarmaDepartment of Surgery, University of California San Francisco, San Francisco, CA, USA.
Ankit SarinDepartment of Surgery, University of California San Francisco, San Francisco, CA, USA.
University of California, San Francisco · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRobotic transanal minimally invasive surgery (R-TAMIS) is an appealing alternative to transanal minimally invasive surgery (TAMIS) and transanal endoscopic microsurgery (TEM) for benign and early malignant rectal lesions that are not amenable to traditional open transanal excision. However, no studies to our knowledge have directly compared the three techniques. This study sought to compare peri-operative and pathologic outcomes of the three approaches.

methodsThe records of 29 consecutive patients who underwent TEM, TAMIS, or R-TAMIS at a single academic center between 2016 and 2020 were reviewed. Intra-operative details, pathological diagnosis and margins, and post-operative outcomes were recorded. The three groups were compared using chi-square and Kruskal-Wallis tests.

resultsOverall, 16/29 patients were women and the median age was 57 (interquartile range (IQR): 28-81). Thirteen patients underwent TEM, six had TAMIS, and 10 had R-TAMIS. BMI was lower in the R-TAMIS patients (24.7; IQR 23.8-28.7), than in TEM (29.3; IQR 19.9-30.2), and TAMIS (30.4; IQR 26.6-32.9) patients. High grade dysplasia and/or invasive cancer was more common in TAMIS (80%) and R-TAMIS (66.7%) patients than in TEM patients (41.7%). The three groups did not differ significantly in tumor type or distance from the anal verge. No R-TAMIS patients had a positive surgical margin compared to 23.1% in the TEM group and 16.7% in the TAMIS group. Length of stay (median 1 day for TEM and R-TAMIS patients, 0 days for TAMIS patients) and 30-day readmission rates (7.7% of TEM, 0% of TAMIS, 10% of R-TAMIS patients) also did not differ among the groups. Median operative time was 110 min for TEM, 105 min for TAMIS, and 76 min for R-TAMIS patients.

conclusionsR-TAMIS may have several advantages over other advanced techniques for transanal excisions. R-TAMIS tended to be faster and to more often result in negative surgical margins compared to the two other techniques.

Indexed as

Rectal NeoplasmsTransanal Endoscopic SurgeryAnal CanalFemaleHumansMiddle AgedOperative TimeRectumLocal excisionRectal lesionRobotic surgeryTransanal minimally invasive surgery

Identifiers

PMID35346146
PMCPMC8962117
OpenAlexW4220652263

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.