Intellectual Developmental Disorder with Microcephaly and Pontine and Cerebellar Hypoplasia, also known as mental retardation and microcephaly with pontine and cerebellar hypoplasia, is related to syndromic x-linked intellectual disability najm type and cask-related disorders, and has symptoms including muscle spasticity and muscle weakness. An important gene associated with Intellectual Developmental Disorder with Microcephaly and Pontine and Cerebellar Hypoplasia is CASK (Calcium/Calmodulin Dependent Serine Protein Kinase), and among its related pathways/superpathways is Olfactory Signaling Pathway. Affiliated tissues include eye and brain, and related phenotypes are intellectual disability, moderate and severe global developmental delay