A138 ENDOSCOPIC SUBMUCOSAL DISSECTION OUTCOMES IN T1B COLORECTAL CANCER: A SINGLE CENTER EXPERIENCE
Notice bibliographique
Résumé
Abstract Background Endoscopic submucosal dissection (ESD) has transformed the approach to gastrointestinal neoplasms, particularly in managing T1 colorectal cancer(CRC) with superficial submucosal invasion (SMI), which is considered curative when other high-risk features are absent. Aims The aim of this study is to describe a single center’s experience with safety, and technical and clinical outcomes for patients undergoing ESD with T1b CRC, as well as explore differences in outcomes depending on depth of SMI. Methods This is a retrospective, single center study of patients who underwent ESD for suspected CRC at the Kingston Health Sciences Center, Ontario, Canada between October 2016 and April 2023. Patients with T1b CRC on their final pathology were included. We analyzed patient demographics, tumor characteristics, and technical outcomes. Patients were followed to determine cancer-free survival and tumor recurrence. Patients were stratified and compared by depth of SMI on their final pathology. Results A total of 32 patients with 33 T1b CRCs were included. 19 lesions had superficial SMI, and 14 had deep SMI on final specimens. Two procedures were aborted due to suspected deep invasion or fibrosis limiting ESD. The mean procedure time was 74.5 minutes and the mean efficiency was 12.3 min/cm3. ESD had high en-bloc (90.9%) and R0 (78.7%) resection rates, and there was no significant difference regardless of depth of SMI (p=0.08 and 0.372, respectively). 24 of 33 lesions had biopsy prior to ESD, and 22 of 24 lesions with previous histology (91.7%) had upgrade in pathology on their final ESD specimen. 2 patients had adverse events, and both were managed supportively. A total of 9 patients (27%) went on to have surgery. Those with deep SMI were more likely to have surgery (5% vs 57%, pampersand:003C0.005). The most common reason was lymphovascular invasion (44%). However, in the 7 patients who had complete ESD procedure and subsequent surgery, none had residual cancer on their surgical specimens, or malignant lymph nodes. The follow-up period for all patients ranged from 1 to 43 months with a mean follow-up time of 14.9 months. Of those who did not have surgery, all were cancer free at a mean follow up time of 16.2 months. Within the group of patients who had surgery, all were cancer free at a mean follow up time of 11.6 months. 5 patients died during the follow up period. None were from procedural related complications or disease recurrence. Conclusions ESD for T1b CRC is safe with high en-bloc and R0 resection rates. Patients with deep SMI were more likely to go on to have surgery, though this was frequently due to an additional high risk feature. Recurrence rates were low, but studies with longer follow up are needed. Funding Agencies None
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,002 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,001 | 0,000 |
| Science ouverte | 0,000 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».