The anatomy of peripheral nerves and innervation pattern in the upper extremity has been studied extensively by various authors over the decades. Anomalies and normal variations of all three major nerves have been described in the sensory patterns on both the palmar and dorsal aspect of the hand. This is a case report of a 29-year-old male who presented with a hypothenar mass. On exploration, he was found to have an abnormal communicating branch between the palmar ulnar digital nerve to the little finger and the dorsal branch of the ulnar nerve. This anomaly has not previously been described in the literature.
