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Record W4323295424 · doi:10.1097/dcr.0000000000002617

Oncological Outcomes of Transanal Endoscopic Surgery for the Surgical Management of T2 and T3 Rectal Cancer

2023· article· en· W4323295424 on OpenAlexaffabout
Garrett Johnson, Reagan L. Robertson, Ashley Vergis, Manoj J. Raval, P. Terry Phang, Ahmer Karimuddin, Carl J. Brown

Bibliographic record

VenueDiseases of the Colon & Rectum · 2023
Typearticle
Languageen
FieldMedicine
TopicColorectal Cancer Surgical Treatments
Canadian institutionsSt. Paul's HospitalUniversity of British Columbia
Fundersnot available
KeywordsMedicineSurgeryColorectal cancerTotal mesorectal excisionSurgical oncologyStage (stratigraphy)CancerInternal medicine

Abstract

fetched live from OpenAlex

BACKGROUND: Transanal endoscopic surgery is an organ-sparing treatment for early rectal cancer. Patients with advanced lesions are recommended for total mesorectal excision. However, some patients have prohibitive comorbidities or refuse major surgery. OBJECTIVE: To assess the cancer outcomes of patients with T2 or T3 rectal cancers who received transanal endoscopic surgery as their sole surgical treatment. DESIGN: This study used a prospectively maintained database. SETTING: A tertiary hospital in Canada. PATIENTS: Patients who underwent transanal endoscopic surgery for pathology-confirmed T2 or T3 rectal adenocarcinomas from 2007-2020 were included. MAIN OUTCOME MEASURES: Disease-free survival and overall survival, stratified by tumor stage and reason for transanal endoscopic surgery. RESULTS: Among the included 132 patients (T2, n = 96; T3, n = 36), average follow-up was 22 months. Twenty-eight decline oncologic resection, whereas 104 had preclusive comorbidities. Fifteen patients (11.4%) had disease recurrence (4 local, 11 metastatic). Three-year disease-free survival was 86.5% (95% CI, 77.1-95.9) for T2 and 67.9% (95% CI, 46.3-89.5) for T3 tumors. Mean disease-free survival was longer for T2 (75.0 mo; 95% CI, 67.8-82.1) compared to T3 cancers (50 mo; 95% CI, 37.7-62.3; p = 0.037). Three-year disease-free survival for patients who declined radical excision was 84.0% (95% CI, 67.1-100) versus 80.7% (95% CI, 69.7-91.7) in patients too comorbid for surgery. Three-year overall survival rate was 84.9% (95% CI, 73.9-95.9) for T2 and 49.0% (95% CI, 26.7-71.3) for T3 tumors. Patients who declined radical resection had similar 3-year overall survival (89.7%; 95% CI, 76.2-100) compared to patients who were unable to undergo excision because of medical comorbidities (98.1%; 95% CI, 95.6-100). LIMITATIONS: Small sample, single institution, and surgeon experience. CONCLUSIONS: Oncologic outcomes are compromised in patients treated by transanal endoscopic surgery for T2 and T3 rectal cancer. Transanal endoscopic surgery remains an option for informed patients who prefer to avoid radical resection. See Video Abstract at http://links.lww.com/DCR/C200 . RESULTADOS ONCOLGICOS DE LA CIRUGA ENDOSCPICA TRANSANAL PARA EL MANEJO QUIRRGICO DEL CNCER DE RECTO T Y T: ANTECEDENTES:La cirugía endoscópica transanal es un tratamiento de conservación de órganos para el cáncer de recto en estadio temprano. A los pacisentes con lesiones avanzadas se les recomienda la escisión total del mesorrecto. Sin embargo, algunos pacientes tienen comorbilidades prohibitivas o rechazan una cirugía mayor.OBJETIVO:Evaluar los resultados del cáncer de pacientes con cáncer de recto T2 o T3 que recibieron cirugía endoscópica transanal como único tratamiento quirúrgico.DISEÑO:Este estudio utilizó una base de datos mantenida prospectivamente.ENTORNO CLINICO:Un hospital terciario en CanadáPACIENTES:Aquellos que se sometieron a cirugía endoscópica transanal por adenocarcinomas rectales T2 o T3 confirmados por patología de 2007-2020. Se excluyeron los pacientes cuya cirugía se realizó por recurrencia del cáncer o posteriormente fueron sometidos a resección radical.PRINCIPALES MEDIDAS DE VALORACIÓN:Supervivencia libre de enfermedad y supervivencia global, estratificada por estadio del tumor y motivo de la cirugía endoscópica transanal.RESULTADOS:Se incluyeron 132 pacientes (T2, n = 96; T3, n = 36). El seguimiento medio fue de 22 meses (DE ± 23,4). 104 pacientes tenían comorbilidades significativas, mientras que 28 rechazaron la resección oncológica. Quince pacientes (11,4%) tuvieron recurrencia de la enfermedad (4 locales, 11 metastásicos). La supervivencia libre de enfermedad a los tres años para los tumores T2 fue del 86,5 % (IC del 95%: 77,1-95,9) y del 67,9% (IC del 95%: 46,3-89,5) para los tumores T3. La supervivencia libre de enfermedad media fue más prolongada para los cánceres T2 (75,0 meses, IC del 95%: 67,8 a 82,1) en comparación con los cánceres T3 (50 meses, IC del 95%: 37,7 a 62,3, p = 0,037). La supervivencia sin enfermedad a los tres años para los pacientes que rechazaron la escisión mesorrectal total fue del 84,0% (IC del 95%: 67,1-100), mientras que los pacientes con demasiada comorbilidad médica para la cirugía tuvieron una supervivencia sin enfermedad a los tres años del 80,7% (IC del 95%: 69.7-91.7). La supervivencia general a los tres años fue del 84,9% (IC del 95%: 73,9 a 95,9) para los tumores T2 y del 49,0% (IC del 95%: 26,7 a 71,3) para los tumores T3. Los pacientes que rechazaron la resección radical tuvieron una supervivencia general similar a los tres años (89,7%, IC del 95%: 76,2-100), en comparación con los pacientes que no pudieron someterse a una escisión mesorrectal total debido a comorbilidades médicas (98,1%, IC del 95%: 95,6-100).LIMITACIONES:Muestra pequeña, institución única, experiencia del cirujano.CONCLUSIONES:Los resultados oncológicos están comprometidos en pacientes tratados con cirugía endoscópica transanal por cáncer de recto T2 y T3. Sin embargo, la cirugía endoscópica transanal sigue siendo una opción para pacientes informados que prefieren evitar la resección radical. Consulte Video Resumen en http://links.lww.com/DCR/C200 . (Traducción-Dr. Ingrid Melo ).

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.002
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.014
Threshold uncertainty score0.028

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.002
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.001
Bibliometrics0.0000.001
Science and technology studies0.0000.000
Scholarly communication0.0010.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.043
GPT teacher head0.346
Teacher spread0.303 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

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Citations2
Published2023
Admission routes2
Has abstractyes

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