Benign cystic teratomas in postmenopausal women.

Postmenopausal benign cystic teratomas occurred in 16 women in a 6-year period. In this group the incidence of malignancy was 19%, and the incidence of bilaterality was 20%. Marked collagenization of the tissue of the teratoma indicated an "end-stage" process. The high incidence of malignancy in this group of patients in an indication for vigorous surgical staging for extent of disease.