Figure 3. IHC staining, the tumoral cells are positive for synaptophysin, (40x) (a), focally positive for S-100 (40x) (b), positive for AE1/AE3 (40x) (c), negative for Vimentin (10x) (d), positive for CD56 (40x) (e), positive for Ki67 (10x) (f), and negative for CD45 (40x) (g).