We report the case of a 55-year-old man who successfully underwent resection of a recurrence of
ulcerative colitis(UC)- associated
colon cancer located in the pancreatic body and left kidney. The patient had undergone an emergency
laparotomy (
total proctocolectomy with stapled
ileal-pouch anal anastomosis)for the treatment of a descending colon
cancer with retroperitoneal penetration associated with UC at the age of 50 years. At that time, histological examinations revealed a
mucinous carcinoma that was classified as Stage II
colon cancer. Three years after the patient's initial operation, a CT scan revealed a small mass located between the pancreatic tail and the left kidney. However, the accumulation of FDG was not observed during a positron emission tomography(PET)examination, resulting in close observation. As the size of the
tumor and the levels of serum
carcinoembryonic antigen and
carbohydrate antigen 19-9 gradually increased, recurrence was highly suspected. A distal
pancreatectomy and left
nephrectomy were performed. Pathological examination showed findings concurrent with a local recurrence of
colon cancer. Special histological types, such as
mucinous carcinoma, often occur in some colitic
cancers. For the postoperative surveillance of patients with colitic
cancer, it should be noted that the sensitivity of FDG/PET is lower for
mucinous carcinoma of the colon than it is for more common
colon cancers.