Vitamin B12 deficiency presenting as pyrexia.J Assoc Physicians India. 2011 Jun; 59:379-80.JA
Vitamin B12 deficiency is an uncommon cause of pyrexia. We report the case of a patient who presented with pyrexia and anaemia, which after exclusion of infective, inflammatory or endocrine causes was attributed to megaloblastic anaemia secondary to vitamin B12 deficiency. The patient's fever responded to treatment of vitamin B12 deficiency.