title: Schizophrenia-like psychotic episode precipitated by cobalamin deficiency.
abstract: Although cobalamin deficiency is widely known and usually presents with hematologic and neuropsychiatric manifestations, the psychiatric symptoms are not usually the predominant manifestation. We describe a young single male vegetarian who developed a cobalamin-induced psychotic episode without preceding neurologic manifestations and without any hematologic symptoms. He recovered after a short course of antipsychotics and oral cobalamin supplementation and remained asymptomatic and functionally independent at 1 year of follow-up.
authors.affiliation: Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC.
authors.forename: Shin-Chang
authors.initials: SC
authors.lastname: Kuo
authors.forename: Chin-Bin
authors.initials: CB
authors.lastname: Yeh
authors.forename: Yi-Wei
authors.initials: YW
authors.lastname: Yeh
authors.forename: Nian-Sheng
authors.initials: NS
authors.lastname: Tzeng
mesh_terms: D000328:Adult; D003702:Delusions / Q000175:diagnosis / Q000188:drug therapy / Q000209:etiology; D014676:Diet, Vegetarian / Q000009:adverse effects / Q000523:psychology; D006801:Humans; D008297:Male; D012559:Schizophrenia / Q000175:diagnosis / Q000188:drug therapy / Q000209:etiology*; D012565:Schizophrenic Psychology; D014805:Vitamin B 12 / Q000008:administration & dosage; D014806:Vitamin B 12 Deficiency / Q000150:complications* / Q000175:diagnosis
chemical_list: D014805:Vitamin B 12