Microcephaly, Postnatal Progressive, with Seizures and Brain Atrophy, is also known as infantile cerebral and cerebellar atrophy with postnatal progressive microcephaly. An important gene associated with Microcephaly, Postnatal Progressive, with Seizures and Brain Atrophy is MED17 (Mediator Complex Subunit 17). Affiliated tissues include brain, and related phenotypes are seizure and spasticity