{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T14:42:16Z","timestamp":1787755336892,"version":"build-2784847793"},"reference-count":7,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"4","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 28-year-old woman with long-standing left ulnar wrist pain. Physical examination revealed severe tenderness over the pisiform; imaging findings were normal. Surgical exploration revealed compression of an aberrant branch, likely Kaplan's accessory branch, around the pisiform. Complete symptom relief was achieved after nerve decompression.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Clinical symptoms associated with Kaplan's accessory branch are rare, indicating that many branches may be asymptomatic or overlooked despite the presence of symptoms. Kaplan's accessory branch should be considered as a potential differential diagnosis for refractory ulnar wrist pain.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2106\/jbjs.cc.23.00418","type":"journal-article","created":{"date-parts":[[2023,11,17]],"date-time":"2023-11-17T14:05:08Z","timestamp":1700229908000},"update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":0,"title":["Long-standing Ulnar Wrist Pain Caused by an Anatomic Variant of the Ulnar Nerve"],"prefix":"10.2106","volume":"13","author":[{"given":"Ryusei","family":"Nakui","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7605-6727","authenticated-orcid":false,"given":"Takuji","family":"Iwamoto","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7696-1989","authenticated-orcid":false,"given":"Hiroo","family":"Kimura","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2312-3540","authenticated-orcid":false,"given":"Taku","family":"Suzuki","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7629-0241","authenticated-orcid":false,"given":"Noboru","family":"Matsumura","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masaya","family":"Nakamura","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2023,10]]},"reference":[{"key":"bib1-20240805","first-page":"85","article-title":"Variation of the ulnar nerve at the wrist","volume":"24","author":"Kaplan","year":"1963","journal-title":"Bull Hosp Joint Dis."},{"issue":"3","key":"bib2-20240805","doi-asserted-by":"crossref","first-page":"500","DOI":"10.1016\/j.jhsa.2004.01.006","article-title":"Anatomic study of variations of hypothenar muscles and arborization patterns of the ulnar nerve in the hand","volume":"29","author":"Murata","year":"2004","journal-title":"J Hand Surg Am."},{"issue":"8","key":"bib3-20240805","doi-asserted-by":"crossref","first-page":"939","DOI":"10.3109\/02841851.2010.503193","article-title":"Variations of the ulnar nerve in Guyon's canal: in vivo demonstration using ultrasound and 3 T MRI","volume":"51","author":"Niitsu","year":"2010","journal-title":"Acta Radiol."},{"issue":"6","key":"bib4-20240805","doi-asserted-by":"crossref","first-page":"1231","DOI":"10.1016\/j.jhsa.2005.06.015","article-title":"A variant of Kaplan's accessory branch of the dorsal cutaneous branch of the ulnar nerve: a case report and review of the literature","volume":"30","author":"Hankins","year":"2005","journal-title":"J Hand Surg Am."},{"issue":"1","key":"bib5-20240805","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1016\/S0363-5023(80)80036-0","article-title":"Anomalous volar branch of the dorsal cutaneous ulnar nerve: a case report","volume":"5","author":"McCarthy","year":"1980","journal-title":"J Hand Surg Am."},{"issue":"pt 3","key":"bib6-20240805","first-page":"513","article-title":"An unusual ulnar nerve-median nerve communicating branch","volume":"181","author":"Hoogbergen","year":"1992","journal-title":"J Anat."},{"issue":"4","key":"bib7-20240805","doi-asserted-by":"crossref","first-page":"617","DOI":"10.1016\/0363-5023(94)90270-4","article-title":"Variations of the ulnar nerve and ulnar artery in Guyon's canal: a cadaveric study","volume":"19","author":"K\u00f6nig","year":"1994","journal-title":"J Hand Surg Am."}],"container-title":["JBJS Case Connector"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ovid.com\/10.2106\/JBJS.CC.23.00418","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T13:41:29Z","timestamp":1787751689000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ovid.com\/10.2106\/JBJS.CC.23.00418"}},"subtitle":["A Case Report"],"short-title":[],"issued":{"date-parts":[[2023,10]]},"references-count":7,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2023]]}},"URL":"https:\/\/doi.org\/10.2106\/jbjs.cc.23.00418","relation":{},"ISSN":["2160-3251"],"issn-type":[{"value":"2160-3251","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,10]]}}}