Primary Microcephaly, also known as microcephaly, primary, is related to primary autosomal recessive microcephaly and microcephaly 1, primary, autosomal recessive. An important gene associated with Primary Microcephaly is CENPJ (Centromere Protein J), and among its related pathways/superpathways are EML4 and NUDC in mitotic spindle formation and Organelle biogenesis and maintenance. Affiliated tissues include brain and cortex, and related phenotypes are growth/size/body region and homeostasis/metabolism