Epiphyseal Dysplasia, Multiple, 2, also known as multiple epiphyseal dysplasia 2, is related to multiple epiphyseal dysplasia and epiphyseal dysplasia, multiple, 3. An important gene associated with Epiphyseal Dysplasia, Multiple, 2 is COL9A2 (Collagen Type IX Alpha 2 Chain), and among its related pathways/superpathways are PI3K-Akt signaling pathway and Extracellular matrix organization. Affiliated tissues include bone, and related phenotypes are epiphyseal dysplasia and knee pain