Abstract
Hydatidiform moles are classified as partial or complete by histologic criteria (Am J Obstet Gynecol 131:665–671, 1978 and Am J Obstet Gynecol 132:20–27, 1978). While persistent gestational trophoblastic tumors follow both types, there remains controversy as to whether the malignant extreme of gestational trophoblastic tumors, choriocarcinoma, can follow a partial hydatidiform mole (Am J Obstet Gynecol 127:167–170, 1977 and Arch Gynecol 234:161–166, 1984). In this instance, a 37-year-old woman presented with a partial hydatidiform mole that persisted and was treated with one course of chemotherapy. She attained a remission for 10 months, when a routine follow-up examination revealed an asymptomatic rise in serum betahuman chorionic gonadotropin from baseline to 14,600 mIU/mL. Dilatation and curettage revealed abundant avillous cytotrophoblast and syncytiotrophoblast with marked atypia, diagnostic of choriocarcinoma. Flow cytometry of paraffin blocks of both specimens showed the partial hydatidiform mole to be triploid and the choriocarcinoma diploid. The patient had no evidence of metastatic disease and was successfully treated with multiple-agent chemotherapy.
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