Although radiological findings of cerebral hemiatrophy (Dyke-Davidoff-Masson 
Syndrome) are well known, there is no systematic study about the gender and the 
affected side in this syndrome. Brain images in 26 patients (mean aged 11) with 
cerebral hemiatrophy were retrospectively reviewed. Nineteen patients (73.5%) 
were male and seven patients (26.5%) were female. Left hemisphere involvement 
was seen in 18 patients (69.2%) and right hemisphere involvement was seen in 
eight patients (30.8%). We conclude that male gender and left side involvement 
are frequent in cerebral hemiatrophy disease.