GFAP and sarcoma: In contrast to peripheral CIC-rearranged sarcomas, which typically express WT-1, lack GFAP and Olig-2, and have abundant reticular fibers [19], intracranial CIC::LEUTX fused tumors may be considered as neuroepithelial tumors if they exhibit following features, especially the last two items: (1) GFAP & Olig-2 expression (at least focally positive); (2) Synaptophysin expression; (3) Absence of WT-1 expression; (4) Lack of reticular fibers.