Brachydactyly, Type A2, also known as brachydactyly type a2, is related to brachydactyly, type a4 and brachydactyly. An important gene associated with Brachydactyly, Type A2 is GDF5 (Growth Differentiation Factor 5), and among its related pathways/superpathways are ERK Signaling and Akt Signaling. Affiliated tissues include bone and heart, and related phenotypes are type a2 brachydactyly and clinodactyly of the 5th finger