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Recurrence of Transverse Colon Cancer in Diverticulum 14 Years after Endoscopic Mucosal Resection: A Case Report
Kazuki Shimomura1, Hiromitsu Iwamoto1, Kenji Matsuda1
1Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Wakayama, Japan.
Surgical Case Reports
|April 21, 2026
Summary
Accurate assessment of colon cancer invasion depth within diverticula is challenging, potentially leading to under-treatment. This case shows recurrence 14 years after endoscopic therapy, emphasizing long-term surveillance and pathologist-endoscopist communication.
Area of Science:
- Gastroenterology
- Surgical Oncology
- Pathology
Background:
- Carcinoma originating in a colonic diverticulum is exceptionally rare, with limited reported cases.
- Accurate pathological assessment of diverticular lesions is difficult due to muscularis mucosae distortion, risking misjudgment of invasion depth and treatment errors.
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