Psychiatric syndromes due to avitaminosis B 12 with normal blood and marrow.
D000368:Aged; D001772:Blood Cell Count; D001856:Bone Marrow Examination; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000209:etiology*; D008875:Middle Aged; D014806:Vitamin B 12 Deficiency / Q000150:complications* / Q000175:diagnosis*