Keywords: AFX, atypical fibroxanthoma; HMWK, high molecular weight keratins; IHC, immunohistochemical; MMS, Mohs surgery; SCC, squamous cell carcinoma; atypical fibroxanthoma; cytokeratin stains; dermatologic oncology; immunohistochemical stains; spindle cell neoplasms; squamous cell carcinoma.