Proximal Versus Distal Superior Cluneal Nerve Block in Entrapment Neuropathy

Inclusion Criteria: * Age between 18 and 75 years * Chronic low back and/or gluteal pain lasting longer than 3 months * Localized point tenderness and/or paresthesia on palpation over the unilateral posterior iliac crest * Clinical suspicion of superior cluneal nerve entrapment based on physical examination * Failure to respond to conservative treatment * Ability and willingness to provide written informed consent Exclusion Criteria: * Active local or systemic infection * Cognitive impairment or psychiatric disorders interfering with study participation * History of malignancy or cancer-related pain * Uncontrolled diabetes mellitus or severe comorbid conditions adversely affecting general health * Pregnancy * Known allergy to the medications used in the injection * Prominent radicular pain associated with neurological deficit * History of interventional procedures applied to the lumbar region within the last 6 months * Initiation of another lumbar interventional or medical treatment during the follow-up period * Suspected bilateral superior cluneal nerve entrapment * Sphincter dysfunction related to neurological disease * Bleeding diathesis or coagulation disorders