high or raised vitamin B12

Last reviewed 05/2023

Levels of serum vitamin B12 may be raised in:

• chronic granulocytic leukaemia
• acute myeloblastic leukaemia
• acute promyelocytic leukaemia > 1600 ng/l
• myelosclerosis
• chronic lymphatic leukaemia
• carcinomatosis
• liver disease:
• acute hepatitis
• cirrhosis
• chronic liver disease
• hepatic coma
• polycythaemia rubra vera
• non-leukaemic leucocytosis

NOT increased in Hodgkin's lymphoma or myeloma.