Brachydactyly, Type A1, also known as brachydactyly type a1, is related to brachydactyly, type a1, d and brachydactyly, type a1, c. An important gene associated with Brachydactyly, Type A1 is IHH (Indian Hedgehog Signaling Molecule), and among its related pathways/superpathways are ERK Signaling and Signal Transduction. Affiliated tissues include bone and heart, and related phenotypes are short stature and short thumb