Objective: To describe the indications, rationale, techniques, alternatives, contraindications, complications, and efficacy of lumbar and caudal epidural corticosteroid injections.• Design: Case reports and retrospective and prospective studies were extensively reviewed to provide detailed descriptions of the clinical features of lumbar and caudal epidural corticosteroid injections.• Results: Epidural corticosteroid injections are commonly requested treatments for patients with various low-back or lower-extremity pain syndromes (or both). Most of the reports on the use of this type of treatment are retrospective and noncontrolled. These studies indicate benefit; however, the prospective con-The first reported cases of epidural corticosteroid administration were by Lievre and associates1 in 1953. They described 20 patients who received caudal epidural injections of hydrocortisone for sciatica. During that decade, several other European investigators reported epidural corticosteroid use.'The first cases in the United States were reported by Goebert and colleagues,' who believed that painful nerve root compression syndromes were associated with inflammation and edema. These investigators observed roentgenologic" ...evidence that fluid injected into the epidural space follows the nerves out of the intravertebral foramens and along the peripheral nerves." Thus, they believed that this finding supported administration of a corticosteroid in such a way that its anti-inflammatory action could be concentrated at the pathologic site. In this report, 113 patients received epidural injections of procaine and hydrocortisone for "radicular pain," and results were "good" in 72%. Many other reports have subsequently described this type of treatment.
INDICATIONS AND RATIONALECaudal and lumbar epidural corticosteroid injections have historically been administered to patients with various symp-