Unilateral hydronephrosis caused by invasive mole: a case report.

Invasive mole belongs to gestational trophoblastic neoplasm, which is a highly curable group of pregnancy-related tumors. However, approximately 20% of gestational trophoblastic tumors will be resistant to or relapsed after initial chemotherapy. These resistant and relapsed lesions will require salvage chemotherapy with or without surgery. It is still unclear which regimens are the most effective and least toxic. Here, we report a case of unilateral hydronephrosis presenting 1 week after a history of curettage because of a hydatidiform mole. With the combination treatments of chemotherapy and surgery, the patient was cured.