Microcephaly, Cataracts, Impaired Intellectual Development, and Dystonia with Abnormal Striatum, is also known as mcidds. An important gene associated with Microcephaly, Cataracts, Impaired Intellectual Development, and Dystonia with Abnormal Striatum is KCNA4 (Potassium Voltage-Gated Channel Subfamily A Member 4). Affiliated tissues include brain, and related phenotypes are intellectual disability and dysarthria