Cubital Tunnel Syndrome, sometimes called Sulcus Ulnaris Syndrome or Retrocondylar Groove Syndrome, is a compressive neuropathy of the ulnar nerve most commonly at the level of the cubital tunnel.
Cubital Tunnel Syndrome, sometimes called Sulcus Ulnaris Syndrome or Retrocondylar Groove Syndrome, is a compressive neuropathy of the ulnar nerve most commonly at the level of the cubital tunnel. It was first described by Magee and Phalen in 19449. It is the second most common neuropathy of the upper extremity behind carpal tunnel syndrome, and the most common location for compression of the ulnar nerve. Basic illustration of the cubital tunnel.
The ulnar nerve courses posterior to the medial epicondyle, and olecranon before entering the cubital tunnel. Distal to the cubital tunnel, it courses deep into the forearm between the ulnar and humeral heads of the flexor carpi ulnaris. The etiology can loosely be broken down into primary or idiopathic, which is most common, or secondarily due to some deformity or other process of the elbow.
The most common location is the cubital tunnel, but compression can also occur at the deep flexor pronator aponeurosis, Arcade of Struthers, or Osborns ligament. Less commonly, other locations include the medial intermuscular septum, medial epicondyle, hypertrophy of the medial head of the Triceps Brachii, fascial bands within FCU, accessory anconeus epitrochlearis muscle, or aponeurosis of FDS proximal edge. Osteophyte formation, joint space reduction and ossified bodies (changes of degenerative disease) are seen in a patient with cubital tunnel syndrome. Cubital tunnel syndrome due to snappiing triceps.
Axial T1-weighted MR image with elbow extended shows the ulnar nerve (arrowhead) and the medial triceps (arrow) posterior to the medial epicondyle (*) The diagnosis can typically be made clinically. Onset is often acute or subacute with paresthesia in an ulnar nerve distribution. Pain is not common, but vague discomfort can occur in the medial elbow and forearm.
If you are experiencing symptoms that may be related to a cubital tunnel syndrome, it is important to see a sports medicine physician. Early evaluation and treatment typically lead to better outcomes. Do not ignore pain or symptoms that are limiting your activity.
*This article is for educational purposes only and does not substitute for professional medical advice. Always consult a qualified healthcare provider.*
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