Extragenital malignant mixed mullerian tumor.

A malignant mixed mullerian tumor, originating from the serosa of the sigmoid colon was found in an 82-year-old female. The reproductive organs were normal. There was no evidence of endometriosis. The patient's clinical course deteriorated rapidly and she succumbed to her disease despite aggressive surgery and chemotherapy. Only twelve cases with extragenital malignant mixed mullerian tumors have been described in the past. Pathogenesis is discussed and the literature is reviewed.