[A Case of Curative Surgery for the Medullary Carcinoma of Ascending Colon with Duodenal Invasion].

An 82-year-old female received a diagnosis of an ascending colon tumor with duodenal invasion. A right hemicolectomy and partial duodenectomy were performed. Histopathological examination confirmed a diagnosis of medullary carcinoma of the colon, classified as adenocarcinoma(med>>muc), type 2, 8.3×5.7 cm, T4b(SI:duodenum), N0, M0, Stage ⅡC. The patient was discharged from the hospital on postoperative day 16 without any complications and has shown no recurrence after 2 years of follow-up. Medullary carcinoma of the colon is a relatively new concept with favorable prognosis. In the present case, although invasive surgery was required, the procedure was performed safely, resulting in a curative resection.