Table 1.
p63 and p40 immunohistochemisry in sinonasal small round blue cell tumors
| Diagnosis | p63 | p40 | ||||
|---|---|---|---|---|---|---|
| Focal | Diffuse | Any positivity | Focal | Diffuse | Any positivity | |
| Epithelial | ||||||
| Squamous cell carcinoma | 1/67 (1) | 65/67 (97) | 66/67 (99) | 1/67 (1) | 65/67 (97) | 66/67 (99) |
| Sinonasal undifferentiated carcinoma | 2/11 (18) | 4/11 (36) | 6/11 (55) | 2/11 (18) | 4/11 (36) | 6/11 (55) |
| Nasopharyngeal carcinoma | 0/6 (0) | 6/6 (100) | 6/6 (100) | 0/6 (0) | 6/6 (100) | 6/6 (100) |
| Solid adenoid cystic carcinoma | 2/4 (50) | 0/4 (0) | 2/4 (50) | 2/4 (50) | 0/4 (0) | 2/4 (50) |
| NUT midline carcinoma | 0/4 (0) | 3/4 (75) | 3/4 (75) | 3/4 (75) | 0/4 (0) | 3/4 (75) |
| Neuroectodermal | ||||||
| Esthesioneuroblastoma | 15/46 (33) | 1/46 (2) | 16/46 (35) | 12/46 (26) | 1/46 (2) | 13/46 (28) |
| Ewing sarcoma/PNET | 0/4 (0) | 2/4 (50) | 2/4 (50) | 0/4 (0) | 1/4 (24) | 1/4 (25) |
| Small cell carcinoma | 1/2 (50) | 0/2 (0) | 1/2 (50) | 1/2 (50) | 0/2 (0) | 1/2 (50) |
| Melanoma | 0/9 (0) | 0/9 (0) | 0/9 (0) | 0/9 (0) | 0/9 (0) | 0/9 (0) |
| Hematolymphoid | ||||||
| NK/T cell | 2/4 (50) | 0/4 (0) | 2/4 (50) | 0/4 (0) | 0/4 (0) | 0/4 (0) |
| Diffuse large B cell | 0/7 (0) | 3/7 (43) | 3/7 (43) | 0/7 (0) | 0/7 (0) | 0/7 (0) |
| Mesenchymal | ||||||
| Alveolar rhabdomyosarcoma | 4/7 (57) | 0/7 (0) | 4/7 (57) | 0/7 (0) | 0/7 (0) | 0/7 (0) |