We report a case of submucosal tumor-like anastomotic recurrence of colon cancer. A 77-year-old woman had undergone partial sigmoid resection with functional end-to-end anastomosis (FEEA) 2 years earlier. Pathological examination showed tub2, pT3(SS), int, INFb, ly0, v0, pN2, pPM0, pDM0, pRM0, cH0, cP0, cM0, Stage Ⅲb, curability A. After 12 courses of adjuvant chemotherapy, colonoscopic examination revealed an elevated submucosal tumor-like lesion, 20 mm in diameter, in the anastomosis. PET-CT

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... canning showed high uptake in only the anastomotic lesion (SUV max = 7.52). Under suspicion of anastomotic recurrence of the colon cancer, partial resection was performed. Pathological examination showed a similar histological type, tub2>por2, rT3(SS), int, INFb, ly0, v0, rN0, rPM0, rDM0, rRM0, which led to the diagnosis of anastomotic recurrence of the colon cancer. Submucosal tumor-like anastomotic recurrence of colon cancer is relatively rare, and must be considered based upon the initial findings.