Abnormal head MRI in a neurologically normal boy with hypomelanosis of Ito.

We report on an 8.5-year-old boy with hypomelanosis of Ito (HI) who has an abnormal MRI of the brain but is neurologically normal. There have been many reports of abnormal brain imaging studies in patients with HI, but all reported patients have had abnormal neurologic findings or symptoms. Our patient has had serial, stable head MRI white matter changes and has remained neurologically normal without any neurologic sequelae.