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The omovertebral bone (os omovertebrale) is present in ~35% (range 19-47%) of cases of Sprengel deformity.
It runs from the superomedial border of the scapula to the spinous processes, transverse processes or laminae of C4 to C7 1,2. Occasionally it can be bilateral 2. The connection from the scapula to the vertebrae may be fibrous or osseous.
Treatment and prognosis
Surgical removal of the omovertbral bone is recommended between ages 3-7 years.
- 1. Azouz EM. CT demonstration of omovertebral bone. Pediatr Radiol. 2007;37 (4): 404. doi:10.1007/s00247-006-0395-8 - Pubmed citation
- 2. Baulot E, Trouilloud P, Giroux EA et-al. Ipsilateral omovertebral bones in the levator scapulae muscle and the rhomboid muscle in a Sprengel deformity: case report. Acta Orthop Belg. 1998;64 (1): 92-5. - Pubmed citation
- 3. Kadavkolan AS, Bhatia DN, Dasgupta B et-al. Sprengel's deformity of the shoulder: Current perspectives in management. Int J Shoulder Surg. 2011;5 (1): 1-8. Int J Shoulder Surg (full text) - doi:10.4103/0973-6042.80459 - Free text at pubmed - Pubmed citation
- 4. Páscoa Pinheiro J, Fernandes P, Sarmento M. Bilateral Sprengel Deformity With Bilateral Omovertebral Bone: An Unusual Case in an Adult Patient: A Case Report. JBJS Case Connect. 2023;13(1). doi:10.2106/JBJS.CC.22.00217 - Pubmed