Hypothesis: the nature of pulmonary metastases in choriocarcinoma.
D000328:Adult; D002822:Choriocarcinoma / Q000188:drug therapy; D005260:Female; D006801:Humans; D006828:Hydatidiform Mole / Q000188:drug therapy; D008175:Lung Neoplasms; D008727:Methotrexate / Q000627:therapeutic use; D009362:Neoplasm Metastasis; D011247:Pregnancy; D011248:Pregnancy Complications
D008727:Methotrexate