{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T14:50:14Z","timestamp":1787755814934,"version":"build-2784847793"},"reference-count":18,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"1","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"<jats:sec>\n                    <jats:title>Case:<\/jats:title>\n                    <jats:p>We present a unique case of bilateral ulnar longitudinal deficiency (ULD) with concurrent postaxial polydactyly (PAPD) in a 2-month-old boy, an association that has not previously been described.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>ULD, a rare musculoskeletal anomaly, often manifests with complex digital abnormalities. ULD may be associated with other musculoskeletal differences and congenital heart anomalies, necessitating comprehensive evaluation. Considering the Sonic hedgehog-Patched-Gli pathway's role in limb development, we discuss potential genetic mechanisms underlying this dual anomaly. This case broadens our understanding of ULD phenotypes and underscores the need for continued investigation regarding the genetic pathways underlying congenital upper limb differences.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2106\/jbjs.cc.24.00529","type":"journal-article","created":{"date-parts":[[2025,3,14]],"date-time":"2025-03-14T14:01:41Z","timestamp":1741960901000},"update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":1,"title":["Ulnar Longitudinal Deficiency with Postaxial Polydactyly"],"prefix":"10.2106","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9269-0042","authenticated-orcid":false,"given":"Mary","family":"Morcos","sequence":"first","affiliation":[{"name":"Harvard Medical School, Boston, Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1986-2116","authenticated-orcid":false,"given":"Wee Leon","family":"Lam","sequence":"additional","affiliation":[{"name":"Royal Hospital for Children and Young People, Edinburgh, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7709-3098","authenticated-orcid":false,"given":"Andrea S.","family":"Bauer","sequence":"additional","affiliation":[{"name":"Boston Children's Hospital, Boston, Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2025,1]]},"reference":[{"issue":"2","key":"bib1-20250618","doi-asserted-by":"crossref","first-page":"180.e1","DOI":"10.1016\/j.jhsa.2022.05.021","article-title":"An analysis of associated conditions and the relationship between the severity of hand manifestations with that of the forearm in ulnar longitudinal deficiency","volume":"49","author":"Dwivedi","year":"2024","journal-title":"J Hand Surg Am."},{"issue":"6","key":"bib2-20250618","first-page":"e40111","article-title":"Ulnar longitudinal deficiency: a case report","volume":"15","author":"Velasques Restrespo","year":"2023","journal-title":"Cureus."},{"issue":"9","key":"bib3-20250618","doi-asserted-by":"crossref","first-page":"1739","DOI":"10.1016\/j.jhsa.2009.09.002","article-title":"Congenital longitudinal deficiency","volume":"34","author":"Bednar","year":"2009","journal-title":"J Hand Surg Am."},{"issue":"3","key":"bib4-20250618","doi-asserted-by":"crossref","first-page":"221","DOI":"10.1136\/jmg.11.3.221","article-title":"Congenital limb anomalies: frequency and aetiological factors. 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