{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T12:36:51Z","timestamp":1782477411606,"version":"3.54.5"},"reference-count":22,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2015,8,12]],"date-time":"2015-08-12T00:00:00Z","timestamp":1439337600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Hand Surg Eur Vol"],"published-print":{"date-parts":[[2016,3]]},"abstract":"<jats:p>Synpolydactyly is an uncommon congenital anomaly characterized by polydactyly with syndactyly in the central hand. The purpose of this investigation was to develop and assess the reliability of a radiographic classification system for synpolydactyly. We identified 56 hands with central synpolydactyly and developed a radiographic classification system that categorizes by the location within the hand, the bony level of polydactyly, and the presence of a delta phalanx. Four paediatric hand surgeons independently reviewed each radiograph to establish reliability. There was exact agreement among raters in 40 cases (71%). The inter-rater reliability was 0.97 and intra-rater reliability was at least 0.87. Seven of 16 bilateral cases had symmetric deformity classification. The most common presentations were types 1A and 2A. We present a new, reliable radiographic classification system for synpolydactyly that will allow improved communication between clinicians and serve as a foundation for future investigations.<\/jats:p>\n                  <jats:p>Level of Evidence: 2<\/jats:p>","DOI":"10.1177\/1753193415598281","type":"journal-article","created":{"date-parts":[[2015,8,12]],"date-time":"2015-08-12T21:50:05Z","timestamp":1439416205000},"page":"301-307","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":12,"title":["Synpolydactyly of the hand: a radiographic classification"],"prefix":"10.1177","volume":"41","author":[{"given":"L. B.","family":"Wall","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery, Shriner\u2019s Hospital for Children and St. Louis Children\u2019s Hospital at Washington University School of Medicine, St Louis, MO, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D. S.","family":"Bae","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Boston Children\u2019s Hospital, Boston, MA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S. N.","family":"Oishi","sequence":"additional","affiliation":[{"name":"Texas Scottish Rite Hospital, Dallas, TX, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R. P.","family":"Calfee","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Shriner\u2019s Hospital for Children and St. Louis Children\u2019s Hospital at Washington University School of Medicine, St Louis, MO, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C. A.","family":"Goldfarb","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Shriner\u2019s Hospital for Children and St. Louis Children\u2019s Hospital at Washington University School of Medicine, St Louis, MO, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2015,8,12]]},"reference":[{"key":"bibr1-1753193415598281","first-page":"195","volume":"21","author":"Buck-Gramcko D","year":"1989","journal-title":"Handchir Mikrochir Plast Chir"},{"key":"bibr2-1753193415598281","doi-asserted-by":"publisher","DOI":"10.1016\/j.jhsa.2013.11.014"},{"key":"bibr3-1753193415598281","doi-asserted-by":"crossref","unstructured":"Ezaki M. Radial polydactyly. 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