TABLE 1.
INSM1 Immunostaining in CNS Neoplasms
| Diagnosis | Total (%) | Diffuse (%) | Patchy (%) | Rare (%) |
|---|---|---|---|---|
| Medulloblastoma (n = 94) | 82 (87%) | 22 (23%) | 43 (46%) | 17 (18%) |
| Atypical teratoid/rhabdoid tumor (n = 9) | 1 (11%) | 0 (0%) | 0 (0%) | 1 (11%) |
| Pineal parenchymal tumor (n = 28) | 12 (43%) | 1 (4%) | 6 (21%) | 4 (14%) |
| CNS embryonal, other (n = 14) | 6 (43%) | 0 (0%) | 2 (14%) | 4 (29%) |
| Central neurocytoma (n = 11) | 11 (100%) | 7 (64%) | 4 (36%) | 0 (0%) |
| Pituitary adenoma (n = 10) | 10 (100%) | 7 (70%) | 3 (30%) | 0 (0%) |
| Ganglioglioma (n = 14) | 1 (7%) | 0 (0%) | 0 (0%) | 1 (7%) |
| Ependymoma (n = 62) | 3 (5%) | 0 (0%) | 0 (0%) | 3 (5%) |
| Pleomorphic xanthoastrocytoma (n = 8) | 1 (13%) | 0 (0%) | 0 (0%) | 1 (13%) |
| Pilocytic astrocytoma (n = 43) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) |
| Diffuse astrocytoma (n = 29) | 6 (21%) | 0 (0%) | 0 (0%) | 6 (21%) |
| Glioblastoma (n = 94) | 41 (44%) | 1 (1%) | 10 (11%) | 30 (32%) |
| Total (n = 416) | 174 (42%) | 38 (9%) | 68 (16%) | 67 (16%) |