This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Surgical staging is required in which of the following sex cord stromal tumor 
Select and explain. 
A. Granulosa cell tumor, B. Gynandroblastoma, C. Sertoli - leydig cell tumor (well differentiated), D. Thecoma
A: Granulosa cell tumor
Answer: A: Granulosa cell tumor 
Explanation: Surgical staging is required in

Granulosa cell tumor
Fibrosarcoma 
Sertoli - Leydig cell tumor (intermediate and poorly differentiated)
Sex-cord stromal tumor with annular tubules (independent of peutz-Jeghers syndrome)