POLYPOID TERATOMA OF THE UTERINE CERVIX
Reported is a case of 16 year-old girl with a huge polypoid tumor of the uterine cervix comprising 10 or more nodules and filling the vaginal lumen. The gross appearance of the tumor resembled that of a botoryoid sarcoma. Histological study indicated that the tumor consisted largely of myxoid mesenchymal tissues, including foci of undifferentiated mesenchymal cells, cartilage and striated muscles with various degrees of maturation, smooth muscles, possible respiratory epithelium and neuroglial tissues in addition to many microcystic structures like Nabothian follicles. She has been free of recurrence postoperatively for 5.5 years. The tumor is interpreted on these data as representing a benign teratoma of the uterus, which is of extreme rarity and probably the first reported case in Japan. It is emphasized that the uterine teratoma must be distinguished from botroyoid sarcoma and benign papilloma or polypoid tumor of the uterine cervix because of the similarity of the gross appearance.