Squamous cell carcinoma arising in an epidermal cyst.
D000293:Adolescent; D000328:Adult; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis*; D004814:Epidermal Cyst / Q000175:diagnosis*; D006801:Humans; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis*; D012535:Scalp; D012878:Skin Neoplasms / Q000175:diagnosis*