Table 2:

Structural brain abnormalities

LocationNo.
Posterior fossa
    Cerebellar hypoplasia18
    Atrophy of cerebral peduncle2
Malformations of cortical development
    Callosal dysgenesis3
    Hemispheric hypoplasia2
    Subependymal heterotopia2
    Polymicrogyria2
Extra-axial lesions
    Intracranial hemangioma3
    Lipoma2a
Other
    Thin corpus callosum2
    Ocular abnormality2b
    Hippocampal malrotation2
    Cranial nerve dysplasia (7/8 complex)1
    Pituitary ectopia1

  • a One interhemispheric lipoma was seen in association with callosal dysgenesis; 1 infracollicular lipoma was seen in isolation.

  • b One case each of coloboma and microphthalmia.