<prompt> A case of gestational trophoblastic neoplasia is detected to have lung metastasis. She should be staged as:Stage-IStage-IIStage-IIIStage - IV  <response>: Ans. is c, i.e. Stage IIIRef. COGDT 10e, p 893Staging of Gestational trophoblastic disease:Stage-I Disease confined to uterus.Stage-II Disease extending outside of the uterus but limited to the genital structures adnexa, vagina, broad ligaments.Stage-III Disease extending to the lungs, with or without known genital tract involvement.Stage-IV Disease at other metastatic sites viz brain, liver, kidney or gastrointestinal tract. 