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  • Title: Selective computed tomography-guided perisciatic injection as a diagnostic tool in multiple hereditary exostoses.
    Author: Tenenbaum S, Arzi H, Shabshin N, Liberman B, Caspi I.
    Journal: Orthopedics; 2012 Sep; 35(9):e1446-8. PubMed ID: 22955418.
    Abstract:
    Multiple osteochondromas, also known as multiple hereditary exostoses, is an autosomal-dominant disease. Multiple osteochondromas are characterized by the development of cartilage-capped bony tumors, known as osteochondromas. Osteochondromas can cause limb deformities, limb-length discrepancies, angular deformations, bursitis, and impingement of adjacent tendons or neurovascular structures. They have also been reported as a cause of sciatic pain. Sometimes, more than 1 location of neural compression exists, thereby presenting a difficult diagnostic challenge for treating physicians. This article describes a patient with multiple hereditary exostoses and accompanying severe sciatic pain who was referred for a revision decompressive spine surgery. The patient's functional impairment was such that he was unable to sit for a few minutes. A selective computed tomography-guided perisciatic nerve injection was performed to differentiate between lateral spinal stenosis and peripheral nerve compression or impingement by an existing large pelvic osteochondroma. The patient reported substantial relief and regained the ability to sit pain free immediately postoperatively. Excision of a proximal femur osteochondroma was performed based on the results of a selective perisciatic nerve injection, resulting in successful resolution of his sciatic pain and functional impairment. The current case is an example of the diagnostic challenge in treating patients with multiple anatomic lesions that can cause symptoms and demonstrate how selective computed tomography-guided perisciatic nerve injection can aid clinicians in obtaining an accurate diagnosis and choosing the most appropriate surgical management.
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