Comparative Effectiveness of Ultrasound-Guided Tenoxicam and Corticosteroid Injections for Lateral Epicondylitis

This prospective, randomized, comparative clinical study aims to compare the effectiveness of ultrasound-guided corticosteroid and tenoxicam injections in patients with lateral epicondylitis. A total of 72 participants will be randomized into two groups. One group will receive an ultrasound-guided methylprednisolone injection and the other group will receive an ultrasound-guided tenoxicam injection. Participants will be evaluated at baseline and at 4 and 12 weeks after treatment. Clinical outcomes will include pain, upper extremity function, lateral epicondylitis-related disability, and grip strength. Ultrasonographic assessment, including tendon thickness and strain elastography, will also be performed to evaluate structural and mechanical changes in the common extensor tendon.