Case report of radiation-induced rectal cancer at the site of a rectal ulcer 33 years after radiation treatment for uterine cancer

Abstract

The patient was a 79-year-old woman who presented with abnormal bowel movements as the chief complaint. Her medical history included radiation therapy (details including dose unclear) for uterine cancer at 46 years of age. At 64 years of age, she had undergone regular endoscopic examination of the lower digestive tract because of abnormal bowel movements. In the first biopsy of the rectal ulcer region, rectal cancer was diagnosed as a well-differentiated adenoma, and an abdominoperineal resection of the rectum was performed. The pathological findings indicated mucinous carcinoma (mp, ly1, v0). We report the case of radiation-induced rectal cancer. In the course of observations after radiation therapy, it is necessary to take secondary cancer into consideration and record the observations accordingly.