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The distribution of the sensory nerve branches in the lateral and the back of the hand have been described more accurately in the past decades due to advancement of high performance electro-diagnostic variation techniques, which indicate that approximately 40% of the population examined have some degree of anatomical variation in the distribution area of the nerves involved. In this case we present an extremely rare, bilaterally detected variation, involving the superficial branch of the radial nerve (SBRN) and lateral antebrachial cutaneous nerve of the forearm (LABCN), where the SBRN is connected integrally with the medial branch of LABCN, forming a common trunk (CT) distributed by the dorsal region of the hand. Furthermore, the lateral branch of the LABCN is distributed in the lateral border of the hand, occupying the area of the skin of the SBRN, an event that is described only once in the literature. The discovery of these anatomical variations in dissected cadavers for teaching purposes, in the Department of Anatomy, have an undeniable educational value for our undergraduate students and especially for the graduate who can observe the enormous variability of human beings first hand, and value implications of this anatomical knowledge in daily clinic. [ABSTRACT FROM AUTHOR]