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Learn about the anatomy, causes, diagnosis, and treatment of sacroiliac joint syndrome and piriformis syndrome. Explore conservative treatments, injections, and surgical stabilization options.
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Pain Originating from the Buttock: Sacroiliac Joint Syndrome and Piriformis Syndrome SirousRezaee. MD
FIGURE 1Posterior view of the articulations and associated ligaments of the sacroiliac joint and surrounding structures. Sources: Drawing by Jee Hyun Kim. From Cohen SP: acroiliacjoint pain: a comprehensive review of anatomy, diagnosis and treatment.
FIGURE 2Innervation of the posterior sacroiliac joint region. A descending branch of the L4 primary ramus innervates the L5–S1 facet joint and the sacroiliac joint. The L5 and S1 primary rami also innervate the L5–S1 facet joint and the sacroiliac joint. Finally, the S2 and S3 sacral nerves innervate the sacroiliac joint. Source: Paris SV: Anatomy as related to function and pain. Symposium on Evaluation and Care of Lumbar Spine Problems.
TABLE 1 Characteristics of Diagnostic Prevalence Studies Using Double-Blocks as Reference Standard
TABLE 2 Causes of Intra-Articular and Extra-Articular Sacroiliac Joint Pain
FIGURE 3 Location of pain in a patient with sacroiliac joint syndrome.
TABLE 3 Randomized, Controlled Studies Evaluating Sacroiliac Joint Injections
Continue TABLE 3 Randomized, Controlled Studies Evaluating Sacroiliac Joint Injections
FIGURE 4 Schematic diagram illustrating: A, Target points for right-sided conventional (L4 and L5) and cooled (S1–S3) radiofrequency denervation at the junction of the L5 superior articular and transverse processes (L4 primary dorsal ramus), the sacral ala (L5 primary dorsal ramus), and S1–S3 foramina (lateral branches). B, Anticipated lesions at each of the target points. Source: Cohen SP, Hurley RW, Buckenmaier CC 3rd, et al: Randomized, placebo-controlled study evaluating lateral branch radiofrequency denervation for sacroiliac joint pain. A B
TECHNIQUES OF PIRIFORMIS MUSCLEAND PERISCIATIC NERVE INJECTIONS
FIGURE 5 Posterior view of the sacrum, ilium, and greater trochanter of the femur, illustrating the course of the piriformismuscle, sciatic nerve, and the site of injection (marked “X”). Source: BenzonHT, Katz JA, Benzon HA, Iqbal MS: Piriformis syndrome: anatomic considerations, a new injection technique, and a review of the literature.
FIGURE 6 Fluoroscopic image of the insulated needle in the piriformismuscle with the muscle being outlined by the injected radiopaque dye.