<prompt> Surgical staging is required in which of the following sex cord stromal tumorGranulosa cell tumorGynandroblastomaSertoli - leydig cell tumor well differentiatedThecoma  <response>: Surgical staging is required inGranulosa cell tumorFibrosarcoma Sertoli - Leydig cell tumor intermediate and poorly differentiatedSex-cord stromal tumor with annular tubules independent of peutz-Jeghers syndrome 