Recurrence of Transverse Colon Cancer in Diverticulum 14 Years after Endoscopic Mucosal Resection: A Case Report.

Histopathology at that time revealed a moderately differentiated adenocarcinoma with submucosal invasion of 800 μm, negative vertical and horizontal margins, and no indication for additional surgery.

Surveillance colonoscopy at 6 months showed only a scar, but then she was lost to follow-up.

After detection of an elevated carcinoembryonic antigen level of 56.8 ng/mL, the patient was referred to us.

The patient recovered uneventfully, underwent laparoscopic incisional hernia repair 1 year later, and remains recurrence-free 24 months after colectomy.