Lack of Myelination in the Anterior Limbs of the Internal Capsule Associated with Cri-du-Chat Syndrome: Case Report

A 21-month-old girl with cri-du-chat syndrome in conjunction with developmental delay underwent brain magnetic resonance imaging (MRI). The MRI showed hypoplasia of the brain stem, a normal cerebellum, thinning of the corpus callosum, and a lack of myelination in both anterior limbs of the internal capsule. She also had neonatal bilateral subependymal cysts. We believe that the symmetrical lack of myelination in both anterior limbs of the internal capsule could be a diagnostic clue of cri-du-chat syndrome.