M66.22

Clinical Causes: Degenerative changes in tendons due to aging Chronic overuse or repetitive strain activities Underlying medical conditions such as rheumatoid arthritis or gout Previous injuries or surgeries leading to weakened tendons Systemic diseases affecting connective tissue health Unexpected trauma or overload that exceeds tendon strength

Key Symptoms: Sudden onset of sharp or tearing pain in the upper arm Rapid swelling or bruising around the affected area Weakness or inability to extend or straighten the arm A palpable gap or abnormal bulge where tendons have ruptured Difficulty performing activities that require arm extension Tenderness upon touch in the region of the rupture

Diagnosis Path: Diagnosis typically involves a thorough clinical examination by a healthcare professional, who will assess arm movement, strength, and injury site. Imaging studies such as ultrasound or magnetic resonance imaging (MRI) are often used to confirm the extent and location of the tendon rupture, providing detailed visualization of soft tissues. These diagnostic tools help distinguish this condition from other musculoskeletal injuries.

Treatment Protocols: Treatment options for spontaneous rupture of extensor tendons depend on the severity and specific location of the tear. Generally, they include: - **Conservative management:** Rest, immobilization with splints or braces, and physical therapy to regain movement and strength in mild cases. - **Surgical intervention:** Tendon repair or reconstruction for complete or severe ruptures to restore function. Postoperative rehabilitation is crucial for optimal recovery. Early diagnosis and appropriate management are essential to prevent long-term disability and restore arm function. Follow-up care is often tailored to individual needs based on the injury's severity.