Abstract
We report a rare case of ovarian cancer with fistula formation between the sigmoid colon. A 58-year-old woman was admitted to our hospital for continuous fever and lower abdominal pain with local muscle guarding. She had received chemotherapy for advanced ovarian cancer for 3 months. Abdominal CT scan revealed the ovarian tumor with a thicken wall and internal gas. These findings suggested ovarian cancer with fistula formation between the digestive tract. As the patient also had severe inflammatory response and peritonitis, emergency laparotomy was performed. At laparotomy there was no fecal matter in the peritoneal cavity. On surgical exploration, the right ovarian tumor had invaded the sigmoid colon, uterus and retroperitoneum, and contained fecal mass. Therefore, we diagnosed the case as right ovarian cancer with fistula formation between the sigmoid colon. Bilateral salpingo-oophorectomy, sigmoidectomy and sigmoid colostomy were performed. Histological examination revealed the tumor was squamous cell carcinoma of the ovary, but no viable cells in the fistula. As ovarian cancer complicated fistula formation between the digestive tract may involve severe inflammation, we should diagnose and treat it immediately.
