Benign teratoma of the Fallopian tube.

Teratoma of the Fallopian tube is very uncommon. Only 47 cases have been reported since 1865. Many have been discovered incidentally and none has been diagnosed preoperatively. The majority are cystic, show great variation in size, are commonly located in the ampulla or isthmus and are either intraluminal or attached to the luminal surface by a pedicle. Histologically they are similar to teratomas of the ovary and elsewhere. Only one instance of malignant tubal teratoma has been recorded. An association with nulliparity or reduced parity has been noted in some cases. The present case of benign tubal teratoma is the 48th and apparently the smallest reported.