<prompt> Good prognosis in gestational trophoblastic disease is seen with which organ metastasis?LiverKidneyBrainLung  <response>: Ans. is d i.e., Lung Gestational Trophoblastic Disease:i Low risk Good Prognosis: Disease is present 4 months duration Initial serum hCG level 40,000 mIUml Metastasis limited to lung and vagina No prior chemotherapy No preceding term deliveryii High Risk Poor Prognosis: Long duration of disease 4 months Initial serum hCG level 40,000 mIUml Brain or liver metastasis Failure of prior chemotherapy Following term pregnancy WHO score 8WHO Prognostic Scoring System for GTTPrognostic factors0124Age3939 Blood groupOO or AB or AB Prior failed chemotherapy Single drug2 or more drugsInterval months between end of antecedent pregnancy start of chemotherapy44-67-1212hCG levels mIUml103103- 104104-105105Antecedent PregnancyMoleAbortionTerm pregnancy Size of tumor cm3 cm3-5cm5 cm Number of metastasis 1-45-88Site of metastasisLungSpleen, kidneyGILiver, brain 4 - Low risk; 5 - 8 - Middle risk; 8 - High Risk 