Brachydactyly, Type D, also known as brachydactyly type d, is related to hemophilia and hemophilia a. An important gene associated with Brachydactyly, Type D is HOXD13 (Homeobox D13), and among its related pathways/superpathways are Response to elevated platelet cytosolic Ca2+ and Collagen chain trimerization. Affiliated tissues include bone, and related phenotypes are broad distal phalanx of the thumb and broad distal phalanx of the hallux