Dyke-davidoff-masson syndrome: ct &mr imaging

Dyke-Davidoff-Masson syndrome also known as cerebral hemiatrophy is a rare entity characterized by unilateral cerebral atrophy secondary to in utero or early childhood cerebral insult such as infarct, trauma or infection. There is ipsilateral compensatory calvarial, diploic hypertrophy and contralateral hemiparesis. We present a case of this uncommon entity and discuss its imaging features, differential diagnosis, treatment options and prognosis.