During the fourth week of development, the upper limb forms from a mass of mesenchymal cells from lateral mesoderm, covered by ectoderm, which later differentiates into bone, cartilage, and blood vessels. Although there are alternative theories regarding the arterial development of the arm, the arterial supply likely initiates as a gradually developing capillary network via angiogenesis and in situ differentiation of mesoderm tissue into endothelial cells, which differentiates in a proximal to distal fashion to form axillary, brachial, and interosseous arteries. It has also been considered that the forearm arterial supply is derived from one single axis artery from the seventh segmental artery (Berezovsky and Bordoni 2021; Rodríguez-Niedenführ et al. 2001).