Turret exostoses are a benign osteocartilaginous lesion.
A turret exostosis is believed to arise from reactive periosteum after relatively mild trauma. It is usually seen as a smooth dome-shaped parosteal bone proliferation.
Turret exostoses are most often found in the phalanges but may also present in rare sites such as the talus 1.
In certain situations, consider:
- 1. LeClere LE, Riccio AI, Helmers SW, Thompson KE. Turret exostosis of the talus. (2010) Orthopedics. 33 (7): 517. doi:10.3928/01477447-20100526-25 - Pubmed
- 2. Kontogeorgakos VA, Lykissas MG, Mavrodontidis AN, Sioros V, Papachristou D, Batistatou AK, Beris AE. Turret exostosis of the hallux. (2007) The Journal of foot and ankle surgery : official publication of the American College of Foot and Ankle Surgeons. 46 (2): 130-2. doi:10.1053/j.jfas.2006.11.006 - Pubmed
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The differential diagnosis for bone tumors is dependent on the age of the patient, with a very different set of differentials for the pediatric patient.
- bone-forming tumors
- cartilage-forming tumors
- bizarre parosteal osteochondromatous proliferation (Nora lesion)
- chondromyxoid fibroma
- juxtacortical chondroma
- fibrous bone lesions
- bone marrow tumors
- other bone tumors or tumor-like lesions
- aneurysmal bone cyst
- benign fibrous histiocytoma
- giant cell tumor of bone
- Gorham massive osteolysis
- haemophilic pseudotumor
- intradiploic epidermoid cyst
- intraosseous lipoma
- musculoskeletal angiosarcoma
- musculoskeletal hemangiopericytoma
- primary intraosseous hemangioma
- post-traumatic cystic bone lesion
- simple bone cyst
- impending fracture risk