Figure 7: (a) Embryonic arteries-as per Baeza's modification of Singer's staging. a-Primitive axial artery. c, d, and m-Radial, ulnar, and median branches, respectively. b-Superficial brachial artery. k + j-Lateral branch of superficial brachial artery. g + h-Medial branch of superficial brachial artery. f-Median branch of superficial brachial artery. l, n, e, i-Anastomotic channels between superficial and primitive axial system. (b) Present case-left side. d, f, i, k, l, n, e-Regress. a-Deep brachial artery. c + j-Radial artery as a continuation of deep brachial artery. b-Superficial brachial artery. g + h-Ulnar artery as a continuation of superficial brachial artery. m-Common interosseous artery as a branch of radial artery