Occult Bowen's disease in keratinous cysts.
D000368:Aged; D001913:Bowen's Disease / Q000150:complications* / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000150:complications*; D004814:Epidermal Cyst / Q000150:complications* / Q000473:pathology; D006801:Humans; D008297:Male; D012878:Skin Neoplasms / Q000150:complications* / Q000473:pathology