Dynamic Nerve Compression of Guyon Canal Secondary to Variation of the Deep Branch of the Ulnar Artery: Etiology, Diagnosis, Treatment, and Outcome

Dynamic ulnar nerve compression at the elbow in a collegiate baseball player due to aberrant branch of the brachial artery

“…While the ulnar, radial, and musculocutaneous nerves were all treated, all shared a common etiology of either an anomalous or hypertrophied muscle causing exercise-induced nerve compression, relieved with surgical decompression of the particular source of entrapment. A recent case report of dynamic J o u r n a l P r e -p r o o f compression of the ulnar nerve at the level of Guyon's canal, due to an anomalous deep branch of the ulnar artery, has been described [5]. However, to our knowledge, this is the first reported case of a dynamic compressive ulnar neuropathy resulting from an aberrant vessel in the arm.…”

“…A recent case report of dynamic compression of the ulnar nerve at the level of Guyon’s canal, due to an anomalous deep branch of the ulnar artery, has been described. 5 However, to our knowledge, this is the first reported case of a dynamic compressive ulnar neuropathy resulting from an aberrant vessel in the arm. The main extrinsic vascular supply to the ulnar nerve about the cubital tunnel has been previously described in cadaver studies, 4 , 8 , 10 including the superior ulnar collateral artery, the inferior ulnar collateral artery, and the posterior ulnar recurrent artery ( Fig.…”