Hypomelanosis of Ito

Hypomelanosis of Ito (HI) is characterised by hypochromic unilateral skin lesions, hemi-hypertrophy, mental retardation (MR) and seizures.1 We describe a young woman with HI with interesting and hitherto unreported magnetic resonance imaging (MRI) changes. A 22 year old woman presented with a history of uncontrolled generalised tonic clonic seizures and myoclonic jerks since the age of 2 years. She had hypopigmented macular lesions in streaks and whorls on her right side in a dermatomal distribution (fig 1 A–D). There …