A 2.6 years old boy previously healthy presented with h/o mild fever and generalized weakness 10 days back following which he became irritable and lethargic and lower limb weakness for 3 days. Plain MRI brain was normal but the CSF study showed albumino-cytologic dissociation and Nerve conduction study showed absence of ‘f ’ waves. He was started on IV Human Immunoglobulin (IV Ig) after which he improved and was discharged in stable condition.