Medial epicondylitis is a repetitive motion disorder involving wrist flexion or forearm pronation. It is common among baseball pitchers and golfers, as well as those who participate in racquet sports and football and in occupations such as carpentry and plumbing. The repetitive activity causes microtrauma to the flexor-pronator mass, including the pronator teres (PT) and flexor carpi radialis (FCR). Owing to its close proximity to these muscles, the ulnar nerve often becomes irritated.
Related Anatomy
- PT
- FCR
- Flexor digitorum superficialis
- Palmaris longus
- Flexor carpi ulnaris
- Ulnar nerve
Pathophysiology
Incidence and Related Conditions
- Affects men and women equally
- Affects dominant extremity in 75% of cases
- Five times less prevalent than lateral epicondylitis (tennis elbow)
- Frequently associated with ulnar neuropathy and ulnar collateral ligament insufficiency
Differential Diagnosis
- Cubital tunnel syndrome
- Ulnar collateral ligament insufficiency
- Medial collateral ligament injury