ABSTRACT
Pathology Like lateral epicondylitis, medial epicondylitis is thought to represent a repetitive overuse injury. The pathology is at the origin of the flexor-pronator musculotendenous region of the medial epicondyle with pronator teres and flexor carpi radialis being affected more often than palmirus longus, flexor digitorum superficialis and flexor carpi ulnaris. In most cases there is partial or complete tears of the flexor tendon with disruption of the normal collagen architecture with ingrowth of fibroblastic and granulation tissue. Acute and chronic inflammatory cells can be absent. This appearance has been referred to as micro-tearing followed by incomplete healing and degeneration which may be referred to as tendinopathy.
