Document resource
Elevated serum vitamin B 12 levels are increasingly encountered in paediatric practice and represent a common reason for referral to paediatric haematology and oncology clinics.1 Although hypercobalaminaemia is well recognised in association with malignancies, liver and renal diseases and inflammatory conditions, its clinical significance in children remains unclear.2 3 In daily practice, incidental detection of high vitamin B12 levels frequently raises concern among clinicians and families, often leading to specialist referral.