Sacroiliac joint and lumbar zygapophysial joint corticosteroid injections.

The sacroiliac joint and the lumbar zygapophysial joints are both known pain generators with demonstrated pain-referral patterns. They are both amenable to image-guided intraarticular injection of corticosteroids, a procedure that is commonly performed for pain. The literature on the efficacy of intraarticular corticosteroid injections for these joints is currently limited. This article covers the diagnostic dilemmas associated with these joints, the utility of anesthetic blocks, and the literature on the efficacy of intraarticular corticosteroid injections.