Table 1.
Immunohistochemical panel
| Antigen | Result | % (# of cases) |
|---|---|---|
| Desmin | P, S, D, C | 100% (52/52) |
| Myogenin | P, S, D, N | 100% (48/48) |
| MYOD1 | P, S, D, N | 100% (20/20) |
| Myoglobin | P, S, F, C | 37% (7/19) |
| Actin (HHF35) | P, S, D, C | 96% (23/24) |
| Actin-SM | P, S, D, C | 52% (14/27) |
| Cytokeratin | P, W-S, F-D, C-T | 36% (16/45) |
| CAM5.2 | P, W-S, F-D, C-T | 50% (22/44) |
| CK5/6 | P, S, D, T | 5% (1/21) |
| S100 protein | P, S, F, N & C | 27% (12/44) |
| SOX10 | P. S, F, N | 0% (0/16) |
| CD56 | P, S, D, M | 100% (32/32) |
| Synaptophysin | P, W-S, F-D, C | 35% (17/48) |
| Chromogranin | P, W, F, C | 13% (6/45) |
P positive, S strong, D diffuse, F focal, C cytoplasmic, N nuclear, W weak, T dot-like, M membrane