Fig. 1

One case of cystic SST. The cut surface of SST was cystic (A). The cellular foci consisted of round cells admixed with spindle cells (B, × 100 and C, × 200). Oil Red O staining was positive in lipid-rich cells (D, × 200). The spindle tumor cells weakly expressed SMA (E, × 200). The round cells and spindle cells did not express desmin (F, × 200). CD34 outlines a rich vascular network (G, × 200). TFE3 was diffuse positive in the lipid-rich cells (H, × 200)