M20.031

Clinical Causes: Rheumatoid arthritis: an autoimmune condition that causes joint inflammation and damage. Trauma or injury: such as fractures or dislocations that damage finger ligaments and joints. Chronic joint conditions: degenerative diseases that weaken the joint structures. Previous finger surgery: scarring or changes after surgical procedures may lead to deformity. Ligament imbalances: due to aging or nerve conditions that alter finger stability.

Key Symptoms: Exaggerated bend in the middle finger joint (PIP), causing the finger to appear curved or distorted. The fingertip may bend back (hyperextension) at the outermost joint (DIP). Difficulty in forming a fist or gripping objects properly. Tenderness or swelling around the affected joint. Reduced range of motion, leading to stiff fingers. Possible crepitus or a crackling sensation during finger movements.

Diagnosis Path: Diagnosis involves a thorough physical examination of the hand and fingers, where the healthcare provider observes the deformity and assesses joint function. Imaging tests like X-rays may be ordered to evaluate bone and joint integrity, check for joint damage, and rule out other conditions. The medical history, including any past injuries or underlying rheumatic diseases, is also considered.

Treatment Protocols: Managing swan-neck deformity often requires a combination of approaches tailored to the severity of the deformity and underlying cause. Common treatments include: - **Splinting or Conservative Devices:** To support the finger and prevent further deformity. - **Physical or Occupational Therapy:** Exercises designed to improve joint strength and flexibility. - **Medications:** Anti-inflammatory drugs or corticosteroids to reduce inflammation, especially if linked to rheumatoid arthritis. - **Surgical Intervention:** In cases where deformity causes significant functional impairment, procedures like ligament repair, joint fusion, or tendon repair may be considered. Early intervention can help prevent progression, preserve hand function, and improve the quality of life.