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Comparison of the immunohistochemical features of AFX and SCSCC
| Marker | Proportion displaying any extent of staining | p value | |
|---|---|---|---|
| AFX | SCSCC | ||
| p63 | 3/23 (13%) | 9/10 (90%) | <0.0001 |
| CD10 | 18/23 (78%) | 6/10 (60%) | 0.4 |
| Kermix | 1/23 (4%) | 10/10 (100%) | <0.0001 |
| Cytokeratin 5/6 | 1/23 (4%) | 8/9 (89%) | <0.0001 |
| Cytokeratin AE-1/3 | 0/23 (0%) | 10/10 (100%) | <0.0001 |
| p63 and AE-1/3 | 0/23 (0%) | 9/10 (90%) | <0.0001 |
AFX, atypical fibroxanthoma; SCSCC, spindle cell/sarcomatoid squamous cell carcinoma
