title: Optic neuropathy associated with vitamin B12 deficiency.
abstract: A 17-year-old boy with vitamin B12 deficiency that occurred after a small bowel resection developed bilateral centrocecal scotomas during folic acid therapy and improved on therapy including vitamin B complex.
mesh_terms: D000293:Adolescent; D005492:Folic Acid / Q000009:adverse effects; D005734:Gangrene / Q000601:surgery; D006801:Humans; D006879:Hydroxocobalamin / Q000627:therapeutic use; D007244:Infectious Mononucleosis / Q000188:drug therapy; D007421:Intestine, Small / Q000601:surgery; D008286:Malabsorption Syndromes / Q000150:complications; D008297:Male; D009901:Optic Nerve Diseases / Q000188:drug therapy / Q000209:etiology*; D011183:Postoperative Complications; D012607:Scotoma / Q000209:etiology; D014805:Vitamin B 12 / Q000627:therapeutic use; D014806:Vitamin B 12 Deficiency / Q000150:complications* / Q000188:drug therapy / Q000209:etiology
chemical_list: D005492:Folic Acid; D014805:Vitamin B 12; D006879:Hydroxocobalamin