3A01
Megaloblastic anaemia due to vitamin B12 deficiency
Anemia megaloblástica devido a deficiência de vitamina B12
CategoryDefinition
A disease caused by inadequate dietary intake of vitamin B12, impaired absorption of vitamin B12, surgical removal of the small bowel, coeliac disease or inherited mutations affecting absorption of vitamin B12. This disease is characterised by decreased levels of vitamin B12 in the body presenting with or without anaemia. This disease may present with fatigue, pallor, dizziness, seizures, or symptoms of dementia. Confirmation is by identification of decreased levels of vitamin B12 in a blood sample.
Subcategories (6)
3A01.0Hereditary vitamin B12 deficiency anaemia3A01.1Neonatal vitamin B12 deficiency anaemia3A01.2Vitamin B12 deficiency anaemia due to low intake3A01.3Vitamin B12 deficiency anaemia due to intrinsic factor deficiency3A01.4Vitamin B12 deficiency anaemia due to intestinal disease3A01.5Drug-induced vitamin B12 deficiency anaemia