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Osteochondromas are benign lesions of bony or cartilaginous origin and are usually found in the metaphyseal region of long bones. They represent by far the most common primary bone tumours. However, osteochondromas arising from the carpal bones are extremely rare with very few cases reported in the literature. This case illustrates the need to include \u2018tumour\u2019 as a differential diagnosis in every unusual appearing bony lesion, even if there is a history of trauma.<\/jats:p>","DOI":"10.1136\/bcr-2015-210884","type":"journal-article","created":{"date-parts":[[2015,8,3]],"date-time":"2015-08-03T23:38:38Z","timestamp":1438645118000},"page":"bcr2015210884","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Solitary osteochondroma of the trapezoid disguised as a tooth fragment"],"prefix":"10.1136","volume":"2015","author":[{"given":"Andreas","family":"Baumann","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniela","family":"Pereira","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Katy","family":"Baldwin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Axel","family":"Weusten","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2015,8,3]]},"reference":[{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.1","first-page":"748","article-title":"Manifestations and management of osteochondromas: a retrospective analysis of 382 patients","volume":"72","author":"Saglik","year":"2006","journal-title":"Acta Orthop Belg"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.2","doi-asserted-by":"publisher","DOI":"10.1097\/00004694-200203000-00028"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.3","doi-asserted-by":"publisher","DOI":"10.1148\/radiographics.20.5.g00se171407"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.4","doi-asserted-by":"crossref","first-page":"222","DOI":"10.1097\/00003086-198902000-00026","article-title":"Multiple hereditary osteochondromata","volume":"239","author":"Peterson","year":"1989","journal-title":"Clin Orthop"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.5","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-200208000-00008"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.6","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.186.3.8430192"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.7","doi-asserted-by":"publisher","DOI":"10.1007\/s00776-007-1134-1"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.8","doi-asserted-by":"publisher","DOI":"10.1016\/S0363-5023(79)80131-8"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.9","doi-asserted-by":"publisher","DOI":"10.1016\/S0363-5023(96)80356-X"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.10","doi-asserted-by":"publisher","DOI":"10.1016\/j.jhsa.2009.04.029"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.11","doi-asserted-by":"publisher","DOI":"10.1177\/1753193411404348"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.12","doi-asserted-by":"publisher","DOI":"10.1142\/S021881041100531X"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.13","unstructured":"Khurana J , Abdul-Karim F , Bov\u00e9e JVMG . Osteochondroma. In: Fletcher CDM , Unni KK , Mertens F , eds. World Health Organization classification of tumours. Pathology and genetics of tumours of soft tissue and bone. Lyon, France: IARC, 2002:234\u20136."},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.14","first-page":"293","article-title":"Exostosis: development, evolution and relationship to malignant degeneration","volume":"7","author":"Canella","year":"1981","journal-title":"Ital J Orthop Traumatol"},{"key":"2025042706535529000_2015.aug03_1.bcr2015210884.15","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1096-9896(199906)188:2<119::AID-PATH321>3.0.CO;2-N"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2015-210884","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,27]],"date-time":"2025-04-27T13:54:03Z","timestamp":1745762043000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2015-210884"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,8,3]]},"references-count":15,"alternative-id":["10.1136\/bcr-2015-210884"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2015-210884","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2015,8,3]]}}}