A coalition is a joining of two bones that are normally discrete 1. It is usually a congenital abnormality. The bridge between the bones is initially fibrous, then gradually becomes cartilaginous, finally ossifying. Symptoms tend to arise as the coalition forms a synostosis, which is usually from 8 to 16 years of age 2,3.
- tarsal coalition
- carpal coalition
Many rarer coalitions have been reported in the literature.
History and etymology
Coalition is derived from the Latin word 'coalescere' which means to grow together 1.
- 1. William Alexander Newman Dorland. Dorland's Illustrated Medical Dictionary. (2018) ISBN: 9781416023647
- 2. Venugopal Guduri, Mark A. Dreyer. Talocalcaneal Coalition. (2019) Pubmed
- 3. Duan X, Yang L. Treatment of isolated talonavicular coalition: Case report and literature review. (2018) The Journal of international medical research. 46 (12): 5322-5330. doi:10.1177/0300060518810889 - Pubmed
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