Recurrent partial hydatidiform mole: a report of a patient with three consecutive molar pregnancies.

Hydatidiform mole (HM) is the most common form of gestational trophoblastic neoplasia and is characterized by atypical hyperplastic trophoblasts and hydropic villi. Recurrence of HM is extremely rare. Here, we report the case of a patient with three consecutive partial HMs without normal pregnancy. A 28-year-old woman with gravida 3, para 0, was referred to our hospital with a diagnosis of an invasive mole in December 2003. She had three consecutive molar pregnancies in 2000, 2001, and 2003. All three molar pregnancies were evacuated by suction curettage and the patient was followed by serial beta-human chorionic gonadotropin levels. All three moles were histologically confirmed as partial moles. In the first two molar events no additional treatment after evacuation was required, but in the last event, the beta-human chorionic gonadotropin levels increased and an invasive mole was suspected. Diagnostic workup ruled out an invasive mole and choriocarcinoma. Karyotypic analysis of the patient and her husband was normal. The patient required chemotherapy for treatment of persistent disease. Recurrent partial HM is a very rare clinical disorder. Repetitive molar pregnancy is not an indication for chemotherapy, but persistent disease does require chemotherapy.