BRD2 and granular cell tumor: For this purpose, we utilized fresh tumor samples of adult and juvenile types as well as two different GCT cell lines (COV434 and KGN) in comparison to immortalized mitotic non-luteinizing FSH-responsive human (HGrC1) and rat (SIGC) granulosa cell lines and primary human luteinized granulosa cells (HLGCs) obtained from In vitro fertilization (IVF) patients in this translational research study.