{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T02:10:29Z","timestamp":1791252629495,"version":"4.1.0"},"reference-count":54,"publisher":"Georg Thieme Verlag KG","issue":"07","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Knee Surg"],"published-print":{"date-parts":[[2026,6]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Anteromedial rotatory instability (AMRI) resulting from medial collateral ligament (MCL) injuries, often combined with anterior cruciate ligament (ACL) tears, poses a significant challenge in knee surgery. This study evaluates the use of a novel technique\u2014semimembranosus (SM) tendon transposition\u2014as an augmentation to ACL and superficial MCL (sMCL) reconstruction, reducing medial knee opening and AMRI. A case series of 15 patients with AMRI underwent ACL and sMCL reconstruction with SM tendon transposition between January 2017 and July 2021, with a minimum follow-up of 24 months. Inclusion criteria included age 18 to 50 years, AMRI diagnosed clinically, and a minimum 24-month follow-up. Exclusion criteria included high-grade osteoarthritis, knee dislocations, and revision surgeries. Outcomes were assessed using the Lysholm Knee Score (LKS) and stress radiographs, manually performed at 0 and 30\u2009degrees of knee flexion, to measure medial compartment gapping preoperatively and at 12 and 24 months postoperatively. Significant improvements were observed in LKS, with mean scores increasing by 121% from 42.8\u2009\u00b1\u20095.9 preoperatively to 97\u2009\u00b1\u20092.8 at 12 months and by 132% to 99.2\u2009\u00b1\u20091.8 at 24 months (p\u2009&lt;\u20090.001). Radiographic medial opening decreased by 81% from 5.46\u2009\u00b1\u20090.74\u2009mm preoperatively to 1.05\u2009\u00b1\u20090.9\u2009mm at 12 months and by 83% to 0.92\u2009\u00b1\u20090.92\u2009mm at 24 months (p\u2009&lt;\u20090.001). All patients (100%) exceeded the minimal clinically important difference for LKS, and no residual instability was observed at final follow-up. The complication rate was 13% (arthrofibrosis), within the expected range for knee reconstructions. SM tendon transposition effectively restored medial stability and improved functional outcomes in AMRI patients, without the need for additional grafts or tunnels, presenting a low complication rate.<\/jats:p>","DOI":"10.1055\/a-2779-0226","type":"journal-article","created":{"date-parts":[[2026,1,13]],"date-time":"2026-01-13T23:44:42Z","timestamp":1768347882000},"page":"383-389","source":"Crossref","is-referenced-by-count":1,"title":["Transposition of the Semimembranosus as an Augmentation Technique for Anteromedial Rotatory Instability of the Knee: A Retrospective Case Series Study"],"prefix":"10.1055","volume":"39","author":[{"given":"Marina Mayumi","family":"Azuma","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Federal University of S\u00e3o Paulo\/Paulista School of Medicine (EPM\/Unifesp), S\u00e3o Paulo\/SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro Soneghet","family":"Gomes","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Federal University of S\u00e3o Paulo\/Paulista School of Medicine (EPM\/Unifesp), S\u00e3o Paulo\/SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edward Patrick Sinibaldi","family":"Eagers","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Federal University of S\u00e3o Paulo\/Paulista School of Medicine (EPM\/Unifesp), S\u00e3o Paulo\/SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9163-7979","authenticated-orcid":false,"given":"Diego da Costa","family":"Astur","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Federal University of S\u00e3o Paulo\/Paulista School of Medicine (EPM\/Unifesp), S\u00e3o Paulo\/SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mois\u00e9s","family":"Cohen","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Federal University of S\u00e3o Paulo\/Paulista School of Medicine (EPM\/Unifesp), S\u00e3o Paulo\/SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leonardo Add\u00eao","family":"Ramos","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Federal University of S\u00e3o Paulo\/Paulista School of Medicine (EPM\/Unifesp), S\u00e3o Paulo\/SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"194","published-online":{"date-parts":[[2026,1,13]]},"reference":[{"issue":"10","key":"ref1","doi-asserted-by":"crossref","first-page":"2797","DOI":"10.1007\/s00167-015-3675-8","article-title":"Anteromedial rotatory laxity","volume":"23","author":"L Engebretsen","year":"2015","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"issue":"05","key":"ref2","doi-asserted-by":"crossref","first-page":"674","DOI":"10.1302\/0301-620X.86B5.14853","article-title":"The posteromedial corner revisited. 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