Study of Hysteroscopic Repeat Curettage as the First-line Treatment in Low-risk Postmolar Gestational Trophoblastic Neoplasia

Inclusion Criteria: * low-risk postmolar gestational trophoblastic neoplasia (GTN) * World Health Organization(WHO) risk score≤4 * Age≤60 years; female, Chinese women * Initial treatment * Performance status: Karnofsky score≥60 * Laboratory tests: WBC≥3.5×10(9)/L, ANC≥1.5×10(9)/L, PLT≥80×10(9)/L, serum bilirubin≤ 1.5 times the upper limit of normal, transaminase≤ 1.5 times the upper limit of normal,blood urea nitrogen, Cr≤ normal * Provide written informed consent. Exclusion Criteria: * Patients with unconfirmed diagnosis of GTN * Patients with placental-site trophoblastic tumor (PSTT) or epithelioid trophoblastic tumor (ETT) * WHO risk score ≥5分 * The diameter of a single metastatic lesion in the lung was ≥2cm * The number of lung CT metastases was≥ 5 * With severe or uncontrolled internal disease, unable to receive chemotherapy * Concurrently participating in other clinical trials * Unable or unwilling to sign informed consents * Unable or unwilling to abide by protocol