MR appearance of placental site gestational trophoblastic neoplasm.

The magnetic resonance imaging (MRI) findings of a patient with placental site trophoblastic tumor are presented. In this patient, a small focal mass distorting the junctional zone and invading the myometrium was identified. Due to the aggressive nature of this neoplasm and the difficulty in detecting it clinically, MRI may represent a useful tool in the evaluation of such tumors.