Vitamin B12 deficiency manifests as triad of anaemia, gastrointestinal abnormalities and neurological abnormalities. The children with vitamin B12 deficiency are often misdiagnosed as it mimics autism spectrum disorders, colics and gastroenteritis. The existence of vitamin B12 deficiency neuropathy was recognised in 1958^[1]. Seizures are rare but are seen especially in infants and there are only a few reports regarding the relationship between infantile spasm and vitamin B12 deficiency. Here we report a case of 19 month old female baby who presented to MKCG medical college, paediatric casualty with complains of hyperpigmentation of skin for 4 months, inability to stand with support for 3 months and sudden flexion of neck, arms and thighs multiple times throught the day for 2 months.

Keywords- Vitamin B12 deficiency, Autism spectrum disease, Seizure, Infantile spasm.