Microcephaly 12, Primary, Autosomal Recessive, also known as mcph12, is related to isolated growth hormone deficiency and female-restricted syndromic x-linked intellectual disability 99. An important gene associated with Microcephaly 12, Primary, Autosomal Recessive is CDK6 (Cyclin Dependent Kinase 6), and among its related pathways/superpathways are Cell Cycle, Mitotic and EML4 and NUDC in mitotic spindle formation. Affiliated tissues include cortex and brain, and related phenotypes are intellectual disability, mild and sloping forehead