Pigmented Bowen's disease.
D000328:Adult; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D007642:Keratosis / Q000175:diagnosis; D008010:Lichen Planus / Q000175:diagnosis; D008297:Male; D010859:Pigmentation Disorders / Q000473:pathology*; D012867:Skin / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis / Q000473:pathology*