[Agenesis of the corpus callosum, heterotopia of the gray cortex and interhemispheric cyst. Late radiologic diagnosis in an asymptomatic adult].

Agenesis of the corpus callosum may occur as an isolated finding; most often, it is present in association with other cerebral malformations such as cortical heterotopias. Computerized tomography and magnetic resonance imaging are methods of choice to detect these cerebral prenatal abnormalities, especially asymptomatic forms. We report the case of an asymptomatic young adult with complete callosal agenesis, cortical heterotopia and interhemispheric cyst, on CT and MR imaging.