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The Pocket-Creation Procedure of Endoscopic Submucosal Dissection for Large Rectal Laterally Spreading Tumors
Published on: February 13, 2026
Identifying rectal carcinoma with distal submucosal spread
Kraemer1, Seow-Choen, Ho
1Department of Colorectal Surgery, Singapore General Hospital, Singapore, Department of Histopathology, Singapore General Hospital, Singapore.
Summary
Identifying rectal cancer patients at high risk for distal submucosal spread is possible. Poorly differentiated tumors and advanced lymph node involvement indicate a higher risk, guiding surgical decisions.
Area of Science:
- Oncology
- Surgical Pathology
Background:
- Rectal carcinoma poses challenges in predicting tumor spread.
- Understanding submucosal invasion is crucial for surgical planning.
Purpose of the Study:
- To identify preoperative predictors of distal submucosal spread in rectal cancer.
- To assess the correlation between tumor characteristics and distal spread.
Main Methods:
- Prospective examination of 124 rectal carcinoma resected specimens.
- Correlation of submucosal spread with patho-anatomical, histological, and operative findings.
Main Results:
- Distal submucosal spread occurred in 3% of patients, exclusively in advanced (Dukes' C) or disseminated cancers.
- Advanced lymph node involvement (N3) and poorly differentiated tumors were significantly associated with distal spread (P=0.0005 and P=0.0002, respectively).
- The combination of these features yielded a 31% risk of distal submucosal spread.
Conclusions:
- Distal submucosal spread in rectal cancer is linked to poorly differentiated histology and advanced lymph node metastasis.
- Preoperative identification of high-risk patients for distal spread is feasible, enabling tailored surgical approaches.
