title: [An 87-year-old man with a rough skin on his buttocks].
abstract: An 87-year-old man consulted the general practitioner with skin lesions on his buttocks. Dermatological findings were erythema without a sharp border, vesicles or crusts. He had a habit of sprawling in his seat, which is the cause of senile gluteal dermatosis, also named sitter's sign or grandfather's disease. After having a better sit habit the skin healed within a few weeks, without application of dermal therapy.
authors.affiliation: Huisartsenpraktijk Vondelplein, Amersfoort.
authors.forename: Rosemarie
authors.initials: R
authors.lastname: de Jong-Met
authors.forename: Wim
authors.initials: W
authors.lastname: Opstelten
mesh_terms: D000369:Aged, 80 and over; D002081:Buttocks / Q000098:blood supply / Q000473:pathology*; D004890:Erythema / Q000473:pathology; D006801:Humans; D008297:Male; D012867:Skin / Q000098:blood supply / Q000473:pathology; D012871:Skin Diseases / Q000175:diagnosis / Q000473:pathology*