Nail bed carcinoma.
Chronic conditions of the nail bed are frequently seen. Rarely a carcinoma will be present, which can only be diagnosed by a high degree of awareness of its possibility and then by performing a biopsy.
D000368:Aged; D000671:Amputation, Surgical; D002294:Carcinoma, Squamous Cell / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D009260:Nail Diseases / Q000473:pathology* / Q000601:surgery; D009369:Neoplasms / Q000473:pathology / Q000601:surgery