This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Twin Pregnancy, Molar Pregnancy, Gestational Trophoblastic disease and contraception in special situations (Sour Grapes!), Subject name: Gynaecology & Obstetrics
A case of Gestational trophoblastic neoplasia is detected to have lung metastasis. She should be staged as 
Select and explain. 
A. Stage - I, B. Stage - II, C. Stage - III, D. Stage - IV
C: Stage - III
Answer: C: Stage - III 
Explanation: FIGO staging system of GTN: Stage I: Disease confined to the uterus Stage II: Gestational trophoblastic tumor (GTT) extends outside of the uterus but is limited to the genital structures (ovary, tube, vagina, and broad ligament) Stage III: GTT extends to the lungs, with or without known genital tract involvement Stage IV: All other metastatic sites