Flexor-Pronator Muscle Strain

synonyms: Flexor-Pronator Muscle Strain

Flexor-Pronator Muscle Strain ICD-9

Flexor-Pronator Muscle Strain Etiology / Epidemiology / Natural History

• Repetitive stress especially in throwing athletes may lead to: Mild muscular overuse, Chronic tendinitis, or Acute muscle tears.

Flexor-Pronator Muscle Strain Anatomy

• Common flexor-pronator muscle origin from the medial epicondyle provides dynamic support to valgus stress especially during throwin.
• Flexor-pronator contractile forces resist valgus stress during early arm acceleration and help produce wrist flexion during ball release. (Sisto DJ, Am J Sports Med 1987;15:260).

Flexor-Pronator Muscle Strain Clinical Evaluation

• Medial elbow pain during the late cocking or acceleration phases of throwing
• tenderness just distal to the common tendon origin from the medial epicondyle.

Flexor-Pronator Muscle Strain Xray / Diagnositc Tests

• A/P, lateral and oblique elbow films indicated, generally normal.

Flexor-Pronator Muscle Strain Classification / Treatment

• generally responds well to a period of active rest with antiinflammatory medication, physical therapy, and gradual return to throwing.
• Consider  corticosteroid injection for chronic flexor-pronator tendinitis, avoid injection in the region of the ulnar collateral ligament.

Flexor-Pronator Muscle Strain Associated Injuries / Differential Diagnosis

• Subluxing ulnar nerve
• Snapping triceps
• Medial Elbow Instability
• Posteromedial Elbow Impingement
• Ulnar Tunnel Syndrome
• Elbow Arthritis
• Medial Epicondylitis
• HNPP
• Wartenberg's Syndrome
• Olecranon Stress Fracture

Flexor-Pronator Muscle Strain Complications

• Continued symptoms

Flexor-Pronator Muscle Strain Follow-up Care

Flexor-Pronator Muscle Strain Review References

• Cain EL. AJSM 2003;31:621