Dyke Davidoff Masson syndrome (DDMS) refers to atrophy or hypoplasia of one 
cerebral hemisphere following a prior fetal or childhood insult. It has 
characteristics of clinical and radiological changes. These changes include 
hemiparesis, seizures, facial-asymmetry, and mental retardation. We present a 
25-year-old man with crossed cerebrocerebellar atrophy and DDMS. His seizures 
were well controlled using a combination of antiepileptic drugs.