A Rare Case of Early Transformation of Gestational Trophoblastic Neoplasia Following Molar Pregnancy.

BACKGROUND Gestational trophoblastic disease (GTD) encompasses a group of disorders that arise from abnormal growth of trophoblastic tissue. The spectrum of GTD includes 2 major groups: benign and malignant. The benign form is a hydatidiform mole, either complete or partial; the malignant forms, referred to as gestational trophoblastic neoplasia (GTN), consist of invasive moles, choriocarcinomas, placental site trophoblastic tumors, and epithelioid trophoblastic tumors. Most patients who undergo evacuation of a hydatidiform mole by curettage have a disease-free period before a new tumor develops that can be considered malignant. In rare cases, metastasis occurs rapidly and manifests coincidentally before the hydatidiform mole can be evacuated. CASE REPORT A 19-year-old woman in Bandung City, West Java, Indonesia, was diagnosed with a molar pregnancy with early evidence of a mass in her vagina that was suspicious for stage II GTN. The early emergence of a vaginal mass was a rare case of early transformation of a molar pregnancy into GTN. CONCLUSIONS Careful evaluation is warranted of patients with characteristics typical of an intrauterine molar pregnancy who have an early presentation of a vaginal mass because of the possibility that the diagnosis could be GTN.