A case of follicular dendritic cell sarcoma with the expression of SRY-box transcription factor 9

, a haploinsufficiency disease with several skeletal malformations that are frequently accompanied by 46, XY sex reversal. 4 Not only for bone and testicular development, SOX9 is also essential for the development of other organs, including the lungs, pancreas, intestine, heart and nervous system. I herein demonstrate that SOX9 is a possible nuclear marker of FDCS