BRD2 and small cell osteogenic sarcoma: In our study, if inhibin-B was less than 100pg/mL and FSH was more than twice the normal, the success rate of biopsy was also low; so that 87% of patients with inhibin-B less than 100pg/mL and 81% with FSH more than twice the normal had histopathology of fibrosis or SCOS.