A Case of an Ovarian Mature Cystic Teratoma Penetrated into the Sigmoid Colon

Abstract

An 85-year-old woman was admitted to our hospital because of fever lasting from the previous day. When she was first seen, the body temperature was 39.5°C. Physical examination revealed distension and a mass with tenderness in the lower abdomen. Abdominal computed tomography suggested the presence of an ovarian cystic teratoma penetrated into the sigmoid colon, because the tumor had gas, fluid, and a stick shaped high density structure. Emergency drainage under local anesthesia was performed because her general condition was poor. The content of the tumor was fecal juice. After a few days of the drainage she underwent surgery under general anesthesia. The left ovarian tumor and the sigmoid colon were removed because the tumor firmly adhered to the sigmoid colon. The tumor was diagnosed as an ovarian mature cystic teratoma on pathological examinations. Because the fistula between an ovarian tumor and the gastrointestinal tract may cause some severe general complications, we should diagnose and treat it as soon as possible.