Abstract               Superficial Palmar Arch is an arterial arcade and a dominant vascular structure in the palm. It is defined as the anastomosis between the superficial branch of the ulnar artery and superficial palmar branch of the radial artery. In ulnar dominant complete superficial palmar arch, the ulnar artery does not anastomose with radial artery and it terminates by supplying thumb and index finger. In the present study, this type of variation was found in 30.43% of the hands. This is in contrast to the classical superficial palmar arch normally described where the arch is completed on the radial side by superficial palmar branch of radial artery. In accordance with the present study, a feature that is present in 50% of the specimens cannot be called as a rare. In these cases, without an efficient collateral circulation, ulnar artery occlusion may cause claudication and gangrene in the digits and has clinical significance.

Key Words: Superficial palmar arch, ulnar dominant complete superficial palmar arch, collateral circulation, anastomosis.