Effect of Ultrasound-Guided Posterior Cutaneous Nerve of the Forearm Epicondylar Branch Block on Pain and Function in Lateral Epicondylitis (PCNF-BrEpi)

This study evaluates the effect of an ultrasound-guided posterior cutaneous nerve of the forearm epicondylar branch block on pain and functional status in patients with lateral epicondylitis. The procedure is performed using ultrasound guidance. Pain and elbow function are assessed before and after the intervention to determine whether this nerve block can improve pain and functional outcomes in patients with lateral epicondylitis.

Inclusion Criteria: * Age between 18 and 65 years * Symptom duration of at least 6 weeks * Clinical and ultrasonographic diagnosis of lateral epicondylitis (based on history, physical examination and provocation tests) * Visual Analog Scale (VAS) pain score of 4 or higher * Signed informed consent form Exclusion Criteria: * Injection or trauma to the affected elbow region within the last 3 months * Cervical radicular pain, median or ulnar entrapment neuropathy, or medial epicondylitis * Use of anticoagulant therapy * Pregnancy or breastfeeding * Psychiatric disorder or cognitive impairment preventing completion of questionnaires and assessment scales * History of allergy to the solutions to be used (triamcinolone or lidocaine) * History of upper extremity surgery or fracture * Connective tissue disease (e.g., rheumatoid arthritis, dermatomyositis) * Diabetes mellitus, fibromyalgia, or polyneuropathy * History of active malignancy