{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T14:41:27Z","timestamp":1787755287735,"version":"build-2784847793"},"reference-count":22,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"3","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>A ring-shaped meniscus (RSM) is a rare malformation of debatable origin usually occurring on the lateral meniscus. Here, we present 2 cases of RSM with differing etiologies and discuss the current literature on the topic. These reports may help with the identification of RSMs in the future and assist in understanding the true etiopathogenesis of individual cases.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>These 2 cases exemplify the variation in presentations of ring-shaped menisci and their radiological features on both x-ray and magnetic resonance imaging. This reinforces the idea that there may be both a congenital and an iatrogenic etiology to this rare condition.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2106\/jbjs.cc.23.00224","type":"journal-article","created":{"date-parts":[[2023,9,21]],"date-time":"2023-09-21T14:53:19Z","timestamp":1695307999000},"update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":2,"title":["Ring-Shaped Meniscus, MRI Features, and Diagnosis"],"prefix":"10.2106","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1332-6715","authenticated-orcid":false,"given":"Matthias","family":"Mitra","sequence":"first","affiliation":[{"name":"University of Bristol, Bristol, England"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yee Han Dave","family":"Lee","sequence":"additional","affiliation":[{"name":"Head Division Sports Shoulder Elbow Surgery, National University Hospital, Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2023,7]]},"reference":[{"issue":"11","key":"bib2-20240805","first-page":"1588","article-title":"Specimen of internal semilunar cartilage as a complete disc","volume":"23","author":"Jones","year":"1930","journal-title":"Proc R Soc Med."},{"issue":"4","key":"bib3-20240805","doi-asserted-by":"crossref","first-page":"638","DOI":"10.1302\/0301-620X.34B4.638","article-title":"A ring-shaped medial semilunar cartilage","volume":"34-B","author":"Basmajian","year":"1952","journal-title":"J Bone Joint Surg Br Vol."},{"issue":"5","key":"bib4-20240805","doi-asserted-by":"crossref","first-page":"502","DOI":"10.1016\/S0749-8063(98)70079-9","article-title":"Ring-shaped lateral meniscus","volume":"14","author":"Monllau","year":"1998","journal-title":"Arthroscopy."},{"issue":"12","key":"bib5-20240805","doi-asserted-by":"crossref","first-page":"1813","DOI":"10.1007\/s00256-015-2197-2","article-title":"Ring-shaped lateral meniscus with hypoplasic anterior cruciate ligament","volume":"44","author":"Esteves","year":"2015","journal-title":"Skelet Radiol."},{"key":"bib6-20240805","doi-asserted-by":"crossref","first-page":"229","DOI":"10.1016\/j.ijscr.2017.01.060","article-title":"Formation of ring-shaped lateral meniscus following anterior cruciate ligament reconstruction: a case report","volume":"31","author":"Fujii","year":"2017","journal-title":"Int J Surg Case Rep."},{"issue":"1","key":"bib7-20240805","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1007\/s00167-013-2612-y","article-title":"Evaluation of the morphological variations of the meniscus: a cadaver study","volume":"23","author":"Ryu","year":"2015","journal-title":"Knee Surg Sports Traumatol Arthrosc."},{"issue":"1","key":"bib8-20240805","doi-asserted-by":"crossref","first-page":"20","DOI":"10.1007\/s00167-005-0629-6","article-title":"An arthroscopic analysis of lateral meniscal variants and a comparison with MRI findings","volume":"14","author":"Kim","year":"2006","journal-title":"Knee Surg Sports Traumatol Arthrosc."},{"issue":"2","key":"bib9-20240805","doi-asserted-by":"crossref","first-page":"281","DOI":"10.1007\/s00256-019-03277-y","article-title":"The ring-shaped meniscus: a case series demonstrating the variation of imaging appearances on MRI","volume":"49","author":"Iqbal","year":"2020","journal-title":"Skelet Radiol."},{"key":"bib10-20240805","doi-asserted-by":"crossref","first-page":"bcr1020114914","DOI":"10.1136\/bcr.10.2011.4914","article-title":"Symptomatic ring-shaped lateral meniscus. MRI findings","volume":"2011","author":"Koukoulias","year":"2011","journal-title":"BMJ Case Rep."},{"issue":"6","key":"bib11-20240805","doi-asserted-by":"crossref","first-page":"738","DOI":"10.1016\/0749-8063(95)90120-5","article-title":"A ring-shaped lateral meniscus","volume":"11","author":"Kim","year":"1995","journal-title":"Arthroscopy."},{"issue":"5","key":"bib12-20240805","doi-asserted-by":"crossref","first-page":"280","DOI":"10.1007\/s00167-002-0292-0","article-title":"Symptomatic ring-shaped lateral meniscus: magnetic resonance imaging and arthroscopy","volume":"10","author":"Atay","year":"2002","journal-title":"Knee Surg Sports Traumatol Arthrosc."},{"issue":"8","key":"bib13-20240805","doi-asserted-by":"crossref","first-page":"852","DOI":"10.1053\/jars.2000.8244","article-title":"Symptomatic ring-shaped lateral meniscus","volume":"16","author":"Arnold","year":"2000","journal-title":"Arthroscopy."},{"issue":"5","key":"bib14-20240805","doi-asserted-by":"crossref","first-page":"292","DOI":"10.1007\/s00256-002-0490-3","article-title":"MR imaging of meniscal malformations of the knee mimicking displaced bucket-handle tear","volume":"31","author":"Fujikawa","year":"2002","journal-title":"Skelet Radiol."},{"issue":"4","key":"bib15-20240805","doi-asserted-by":"crossref","first-page":"981","DOI":"10.1148\/rg.344125202","article-title":"MR imaging-based diagnosis and classification of meniscal tears","volume":"34","author":"Nguyen","year":"2014","journal-title":"Radiographics."},{"issue":"1","key":"bib16-20240805","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1186\/s40634-020-00294-y","article-title":"Discoid lateral meniscus: importance, diagnosis, and treatment","volume":"7","author":"Kim","year":"2020","journal-title":"J Exp Orthop."},{"issue":"8","key":"bib17-20240805","doi-asserted-by":"crossref","first-page":"1165","DOI":"10.2106\/00004623-197557080-00029","article-title":"Congenital absence of the anterior cruciate ligament associated with a ring meniscus","volume":"57","author":"Noble","year":"1975","journal-title":"J Bone Joint Surg Am."},{"key":"bib18-20240805","first-page":"161","article-title":"Comparative morphology of the lateral meniscus of the knee in primates","volume":"170","author":"Le Minor","year":"1990","journal-title":"J Anatomy."},{"issue":"8 suppl 1","key":"bib19-20240805","doi-asserted-by":"crossref","first-page":"S49","DOI":"10.1016\/j.otsr.2009.09.008","article-title":"Comparative anatomy of the knee joint: effects on the lateral meniscus","volume":"95","author":"Javois","year":"2009","journal-title":"Orthop Traumatol Surg Res."},{"key":"bib20-20240805","doi-asserted-by":"crossref","first-page":"226","DOI":"10.1016\/j.ijscr.2019.07.056","article-title":"Ring-shaped meniscus formation may arise from the regenerative response to meniscectomy during growth spurts: a case report","volume":"61","author":"Nagashima","year":"2019","journal-title":"Int J Surg Case Rep."},{"issue":"12","key":"bib21-20240805","doi-asserted-by":"crossref","first-page":"1093","DOI":"10.1016\/j.ijscr.2013.08.023","article-title":"Regeneration of ring-shaped lateral meniscus after partial resection of discoid meniscus with anterior cruciate ligament reconstruction","volume":"4","author":"Soejima","year":"2013","journal-title":"Int J Surg Case Rep."},{"key":"bib22-20240805","doi-asserted-by":"crossref","first-page":"285","DOI":"10.1186\/1471-2474-14-285","article-title":"Re-growth of an incomplete discoid lateral meniscus after arthroscopic partial resection in an 11 year-old boy: a case report","volume":"14","author":"Bisicchia","year":"2013","journal-title":"BMC Musculoskelet Disord."},{"issue":"1","key":"bib23-20240805","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1016\/j.jorep.2022.03.017","article-title":"Two case reports of ring lateral meniscus: a rare anatomical variant","volume":"1","author":"Santosh","year":"2022","journal-title":"J Orthop Rep."}],"container-title":["JBJS Case Connector"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ovid.com\/10.2106\/JBJS.CC.23.00224","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T13:40:40Z","timestamp":1787751640000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ovid.com\/10.2106\/JBJS.CC.23.00224"}},"subtitle":["A Report of 2 Cases"],"short-title":[],"issued":{"date-parts":[[2023,7]]},"references-count":22,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2023]]}},"URL":"https:\/\/doi.org\/10.2106\/jbjs.cc.23.00224","relation":{},"ISSN":["2160-3251"],"issn-type":[{"value":"2160-3251","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,7]]}}}