Macrocytic anaemia complicated by polycythaemia.
D000368:Aged; D000748:Anemia, Macrocytic / Q000150:complications* / Q000209:etiology; D001765:Blind Loop Syndrome; D006778:Hospitals, Psychiatric; D006801:Humans; D008607:Intellectual Disability / Q000150:complications; D008297:Male; D009748:Nutrition Disorders / Q000150:complications; D011086:Polycythemia / Q000150:complications* / Q000209:etiology; D014805:Vitamin B 12 / Q000378:metabolism
D014805:Vitamin B 12