Vitamin B₁₂ deficiency: an unusual cause for recurrent generalised seizures with pancytopaenia.

We report the case of a 70-year-old man with pancytopaenia and new-onset recurrent generalised seizures. Detailed evaluation yielded a diagnosis of vitamin B(12) deficiency. He was treated with parenteral vitamin B(12) supplementation and antiepileptic drugs. Seizures are an unusual manifestation of vitamin B(12) deficiency and possible mechanisms of epileptogenesis are discussed.