title: Bypass phrynoderma. Vitamin A deficiency associated with bowel-bypass surgery.
abstract: A 41-year-old woman had multiple keratotic papules and nodules on the trunk and extremities four years after a bowel-bypass procedure for morbid obesity. The microscopic features were those of a perforating folliculitis. Serum vitamin A levels were extremely low. Oral vitamin A therapy resulted in dramatic improvement of the cutaneous lesions.
mesh_terms: D000328:Adult; D005260:Female; D005499:Folliculitis / Q000188:drug therapy / Q000209:etiology / Q000473:pathology*; D006801:Humans; D007421:Intestine, Small / Q000601:surgery*; D007642:Keratosis / Q000188:drug therapy / Q000209:etiology / Q000473:pathology*; D009765:Obesity / Q000628:therapy; D011183:Postoperative Complications; D014801:Vitamin A / Q000627:therapeutic use; D014802:Vitamin A Deficiency / Q000150:complications*
chemical_list: D014801:Vitamin A