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We examined 1,352 chest radiographs to determine the prevalence of cervical ribs in a London population of mixed sex and ethnicity. Our study found that the overall prevalence of cervical ribs was 0.74% with a higher rate in females compared with males (1.09 and 0.42%, respectively). Of the 10 individuals with a cervical rib, five were on the left, three were on the right and two were bilateral. The presence of elongated C7 transverse processes (transverse apophysomegaly) was also noted. We found a total of 30 elongated transverse processes with an overall prevalence of 2.21%. They were also more common in females (3.43%) than males (1.13%). Clin. Anat. 22:331\u2013336, 2009. \u00a9 2009 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ca.20774","type":"journal-article","created":{"date-parts":[[2009,3,11]],"date-time":"2009-03-11T23:26:32Z","timestamp":1236813992000},"page":"331-336","source":"Crossref","is-referenced-by-count":98,"title":["The prevalence of cervical ribs in a London population"],"prefix":"10.1002","volume":"22","author":[{"given":"James","family":"Brewin","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"Hill","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Harold","family":"Ellis","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2009,3,11]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0959-8049(97)00010-5"},{"key":"e_1_2_1_3_1","doi-asserted-by":"crossref","first-page":"265","DOI":"10.1016\/S0030-5898(20)32074-5","article-title":"Thoracic outlet compression syndrome","volume":"27","author":"Atasoy E","year":"1996","journal-title":"Orthop Clin North Am"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1099-1212(199701)7:1<2::AID-OA299>3.0.CO;2-5"},{"key":"e_1_2_1_5_1","volume-title":"On exostosis in surgical essays","author":"Cooper A","year":"1818"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(02)44765-4"},{"key":"e_1_2_1_7_1","first-page":"359","article-title":"Osseous abnormalities of the thoracic cage seen in forty thousand consecutive chest photoroentgenograms","volume":"51","author":"Etter LE","year":"1944","journal-title":"Am J Roentgenol"},{"key":"e_1_2_1_8_1","first-page":"149","article-title":"The prevalence of cervical rib in Anatolian population","volume":"10","author":"Gulekon IN","year":"1999","journal-title":"Gazi Med J"},{"key":"e_1_2_1_9_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF02000592"},{"key":"e_1_2_1_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9610(99)80248-7"},{"key":"e_1_2_1_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/0741-5214(92)90161-Z"},{"key":"e_1_2_1_12_1","first-page":"125","article-title":"The ossification of the costal element of the seventh cervical vertebra with particular reference to cervical ribs","volume":"170","author":"McNally E","year":"1990","journal-title":"J Anat"},{"key":"e_1_2_1_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejmg.2005.01.029"},{"key":"e_1_2_1_14_1","doi-asserted-by":"crossref","first-page":"747","DOI":"10.1016\/S0030-5898(20)32121-0","article-title":"Thoracic outlet syndrome","volume":"27","author":"Novak CB","year":"1996","journal-title":"Orthop Clin North Am"},{"key":"e_1_2_1_15_1","first-page":"11","article-title":"Variation of the transverse apophysis of the 7th cervical vertebra: anatomo\u2010radiological study of an isolated population","volume":"95","author":"Palma A","year":"1990","journal-title":"Arch Ital Anat Embriol"},{"key":"e_1_2_1_16_1","first-page":"281","article-title":"Thoracic\u2010outlet syndrome: Evaluation of a therapeutic exercise program","volume":"31","author":"Peet RM","year":"1956","journal-title":"Proc Staff Meet Mayo Clin"},{"key":"e_1_2_1_17_1","first-page":"170","article-title":"Congenital rib abnormalities; 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