{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T04:11:27Z","timestamp":1778127087879,"version":"3.51.4"},"reference-count":39,"publisher":"Elsevier BV","license":[{"start":{"date-parts":[[2021,8,1]],"date-time":"2021-08-01T00:00:00Z","timestamp":1627776000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2021,8,1]],"date-time":"2021-08-01T00:00:00Z","timestamp":1627776000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"},{"start":{"date-parts":[[2021,8,1]],"date-time":"2021-08-01T00:00:00Z","timestamp":1627776000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-017"},{"start":{"date-parts":[[2021,8,1]],"date-time":"2021-08-01T00:00:00Z","timestamp":1627776000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-037"},{"start":{"date-parts":[[2021,8,1]],"date-time":"2021-08-01T00:00:00Z","timestamp":1627776000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-012"},{"start":{"date-parts":[[2021,8,1]],"date-time":"2021-08-01T00:00:00Z","timestamp":1627776000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-029"},{"start":{"date-parts":[[2021,8,1]],"date-time":"2021-08-01T00:00:00Z","timestamp":1627776000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-004"}],"content-domain":{"domain":["clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","thekneejournal.com","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["The Knee"],"published-print":{"date-parts":[[2021,8]]},"DOI":"10.1016\/j.knee.2021.06.003","type":"journal-article","created":{"date-parts":[[2021,6,29]],"date-time":"2021-06-29T21:29:40Z","timestamp":1625002180000},"page":"164-171","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":13,"special_numbering":"C","title":["Medial meniscus extrusion as a predictor for a poor prognosis in patients with spontaneous osteonecrosis of the knee"],"prefix":"10.1016","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1737-8715","authenticated-orcid":false,"given":"Shogo","family":"Hashimoto","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masanori","family":"Terauchi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazuhisa","family":"Hatayama","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3659-6526","authenticated-orcid":false,"given":"Takashi","family":"Ohsawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takuya","family":"Omodaka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hirotaka","family":"Chikuda","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"issue":"6","key":"10.1016\/j.knee.2021.06.003_b0005","doi-asserted-by":"crossref","first-page":"705","DOI":"10.1002\/art.1780110602","article-title":"Spontaneous osteonecrosis of the knee","volume":"11","author":"Ahlb\u00e4ck","year":"1968","journal-title":"Arthritis Rheum"},{"issue":"6","key":"10.1016\/j.knee.2021.06.003_b0010","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1007\/BF00456868","article-title":"Bone marrow pressure in osteonecrosis of the femoral condyle (Ahlb\u00e4ck's disease)","volume":"106","author":"Kantor","year":"1987","journal-title":"Arch Orthop Trauma Surg"},{"issue":"5","key":"10.1016\/j.knee.2021.06.003_b0015","doi-asserted-by":"crossref","first-page":"260","DOI":"10.1007\/s00256-004-0751-4","article-title":"Presumptive subarticular stress reactions of the knee: MRI detection and association with meniscal tear patterns","volume":"33","author":"Yao","year":"2004","journal-title":"Skeletal Radiol"},{"issue":"1","key":"10.1016\/j.knee.2021.06.003_b0020","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1007\/s001670050064","article-title":"Osteonecrosis of the knee: current clinical concepts","volume":"6","author":"Patel","year":"1998","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"issue":"7","key":"10.1016\/j.knee.2021.06.003_b0025","doi-asserted-by":"crossref","first-page":"983","DOI":"10.1302\/0301-620X.85B7.14580","article-title":"The natural history of spontaneous osteonecrosis of the medial tibial plateau","volume":"85","author":"Satku","year":"2003","journal-title":"J Bone Joint Surg Br"},{"issue":"4","key":"10.1016\/j.knee.2021.06.003_b0030","doi-asserted-by":"crossref","first-page":"410","DOI":"10.3109\/17453674.2013.810521","article-title":"The natural course of spontaneous osteonecrosis of the knee (SPONK): a 1- to 27-year follow-up of 40 patients","volume":"84","author":"Jureus","year":"2013","journal-title":"Acta Orthop"},{"issue":"5","key":"10.1016\/j.knee.2021.06.003_b0035","doi-asserted-by":"crossref","first-page":"588","DOI":"10.1302\/0301-620X.65B5.6643563","article-title":"Idiopathic osteonecrosis of the knee. Aetiology, prognosis and treatment","volume":"65","author":"Aglietti","year":"1983","journal-title":"J Bone Joint Surg Br"},{"issue":"3","key":"10.1016\/j.knee.2021.06.003_b0040","doi-asserted-by":"crossref","first-page":"470","DOI":"10.2106\/00004623-198870030-00027","article-title":"Osteonecrosis of the knee","volume":"70","author":"Lotke","year":"1988","journal-title":"J Bone Joint Surg Am"},{"issue":"4","key":"10.1016\/j.knee.2021.06.003_b0045","doi-asserted-by":"crossref","first-page":"605","DOI":"10.1302\/0301-620X.52B4.605","article-title":"Prognosis in spontaneous osteonecrosis of the knee. Investigation by radionuclide scintimetry and radiography","volume":"52","author":"Muheim","year":"1970","journal-title":"J Bone Joint Surg Br"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0050","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1016\/j.ocl.2008.10.010","article-title":"Osteonecrosis of the knee: a review of three disorders","volume":"40","author":"Zywiel","year":"2009","journal-title":"Orthop Clin North Am"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0055","doi-asserted-by":"crossref","first-page":"212","DOI":"10.1016\/0049-0172(83)90008-2","article-title":"Natural history of spontaneous osteonecrosis of the knee (SONK): a review","volume":"13","author":"Houpt","year":"1983","journal-title":"Semin Arthritis Rheum"},{"issue":"12","key":"10.1016\/j.knee.2021.06.003_b0060","doi-asserted-by":"crossref","first-page":"2104","DOI":"10.1111\/1756-185X.13074","article-title":"Association between medial meniscus extrusion and spontaneous osteonecrosis of the knee","volume":"21","author":"Yasuda","year":"2018","journal-title":"Int J Rheum Dis"},{"issue":"4","key":"10.1016\/j.knee.2021.06.003_b0065","doi-asserted-by":"crossref","first-page":"726","DOI":"10.1016\/j.arthro.2012.11.016","article-title":"Meniscal extrusion and spontaneous osteonecrosis with root tear of medial meniscus: comparison with horizontal tear","volume":"29","author":"Sung","year":"2013","journal-title":"Arthroscopy"},{"issue":"5","key":"10.1016\/j.knee.2021.06.003_b0070","doi-asserted-by":"crossref","first-page":"867","DOI":"10.1016\/j.jos.2019.02.001","article-title":"Medial meniscal extrusion and spontaneous osteonecrosis of the knee","volume":"24","author":"Oda","year":"2019","journal-title":"J Orthop Sci"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0075","doi-asserted-by":"crossref","first-page":"501","DOI":"10.1177\/0363546517743734","article-title":"The role of meniscal tears in spontaneous osteonecrosis of the knee: A systematic review of suspected etiology and a call to revisit nomenclature","volume":"47","author":"Hussain","year":"2019","journal-title":"Am J Sports Med"},{"key":"10.1016\/j.knee.2021.06.003_b0080","doi-asserted-by":"crossref","first-page":"156","DOI":"10.1097\/00003086-199105000-00025","article-title":"Clinical course and roentgenographic changes of osteonecrosis in the femoral condyle under conservative treatment","volume":"266","author":"Motohashi","year":"1991","journal-title":"Clin Orthop Relat Res"},{"issue":"1","key":"10.1016\/j.knee.2021.06.003_b0085","doi-asserted-by":"crossref","first-page":"71","DOI":"10.2214\/ajr.170.1.9423603","article-title":"Early irreversible osteonecrosis versus transient lesions of the femoral condyles: prognostic value of subchondral bone and marrow changes on MR imaging","volume":"170","author":"Lecouvet","year":"1998","journal-title":"AJR Am J Roentgenol"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0090","doi-asserted-by":"crossref","first-page":"477","DOI":"10.1007\/s00167-015-3839-6","article-title":"Predictive factors for the progression of spontaneous osteonecrosis of the knee","volume":"25","author":"Akamatsu","year":"2017","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"issue":"1","key":"10.1016\/j.knee.2021.06.003_b0095","doi-asserted-by":"crossref","first-page":"25","DOI":"10.1016\/j.knee.2015.07.012","article-title":"Analysis of risk factors for poor prognosis in conservatively managed early-stage spontaneous osteonecrosis of the knee","volume":"23","author":"Nakayama","year":"2016","journal-title":"Knee"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0100","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1302\/0301-620X.84B2.0840223","article-title":"Varus inclination of the distal femur and high tibial osteotomy","volume":"84","author":"Terauchi","year":"2002","journal-title":"J Bone Joint Surg Br"},{"issue":"4","key":"10.1016\/j.knee.2021.06.003_b0105","doi-asserted-by":"crossref","first-page":"494","DOI":"10.1136\/ard.16.4.494","article-title":"Radiological assessment of osteo-arthrosis","volume":"16","author":"Kellgren","year":"1957","journal-title":"Ann Rheum Dis"},{"issue":"1","key":"10.1016\/j.knee.2021.06.003_b0110","doi-asserted-by":"crossref","first-page":"47","DOI":"10.2106\/00004623-198264010-00008","article-title":"The treatment of spontaneous osteonecrosis of the knee by high tibial osteotomy with and without bone-grafting or drilling of the lesion","volume":"64","author":"Koshino","year":"1982","journal-title":"J Bone Joint Surg Am"},{"issue":"3","key":"10.1016\/j.knee.2021.06.003_b0115","doi-asserted-by":"crossref","first-page":"425","DOI":"10.1016\/S0030-5898(20)31927-1","article-title":"Deformity planning for frontal and sagittal plane corrective osteotomies","volume":"25","author":"Paley","year":"1994","journal-title":"Orthop Clin North Am"},{"issue":"8","key":"10.1016\/j.knee.2021.06.003_b0120","doi-asserted-by":"crossref","first-page":"894","DOI":"10.1016\/j.arthro.2006.04.098","article-title":"The association between posterior-inferior tibial slope and anterior cruciate ligament insufficiency","volume":"22","author":"Brandon","year":"2006","journal-title":"Arthroscopy"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0125","doi-asserted-by":"crossref","first-page":"363","DOI":"10.1177\/0363546514559684","article-title":"Meniscal root tears: a classification system based on tear morphology","volume":"43","author":"LaPrade","year":"2015","journal-title":"Am J Sports Med"},{"issue":"1","key":"10.1016\/j.knee.2021.06.003_b0130","doi-asserted-by":"crossref","first-page":"152","DOI":"10.1007\/s00167-014-3395-5","article-title":"Diagnostic accuracy of 3.0 T magnetic resonance imaging for the detection of meniscus posterior root pathology","volume":"23","author":"LaPrade","year":"2015","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"issue":"4","key":"10.1016\/j.knee.2021.06.003_b0135","doi-asserted-by":"crossref","first-page":"731","DOI":"10.1016\/j.jos.2017.03.013","article-title":"A giraffe neck sign of the medial meniscus: A characteristic finding of the medial meniscus posterior root tear on magnetic resonance imaging","volume":"22","author":"Furumatsu","year":"2017","journal-title":"J Orthop Sci"},{"key":"10.1016\/j.knee.2021.06.003_b0140","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/j.ejrad.2018.03.007","article-title":"Medial meniscal extrusion: Detection, evaluation and clinical implications","volume":"102","author":"Swamy","year":"2018","journal-title":"Eur J Radiol"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0145","doi-asserted-by":"crossref","first-page":"190","DOI":"10.1302\/0301-620X.91B2.21097","article-title":"Meniscal root injury and spontaneous osteonecrosis of the knee: an observation","volume":"91","author":"Robertson","year":"2009","journal-title":"J Bone Joint Surg Br"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0150","doi-asserted-by":"crossref","first-page":"390","DOI":"10.1016\/j.knee.2016.12.004","article-title":"The role of medial meniscus posterior root tear and proximal tibial morphology in the development of spontaneous osteonecrosis and osteoarthritis of the knee","volume":"24","author":"Yamagami","year":"2017","journal-title":"Knee"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0155","doi-asserted-by":"crossref","first-page":"355","DOI":"10.1007\/s00167-016-4395-4","article-title":"Effect of radial meniscal tear on in situ forces of meniscus and tibiofemoral relationship","volume":"25","author":"Tachibana","year":"2017","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"issue":"1","key":"10.1016\/j.knee.2021.06.003_b0160","doi-asserted-by":"crossref","first-page":"17","DOI":"10.2214\/ajr.183.1.1830017","article-title":"Medial meniscus extrusion on knee MRI: is extent associated with severity of degeneration or type of tear?","volume":"183","author":"Costa","year":"2004","journal-title":"AJR Am J Roentgenol"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0165","doi-asserted-by":"crossref","first-page":"331","DOI":"10.2214\/ajr.154.2.2105026","article-title":"Spontaneous osteonecrosis of the knee: value of MR imaging in determining prognosis","volume":"154","author":"Bj\u00f6rkengren","year":"1990","journal-title":"AJR Am J Roentgenol"},{"issue":"6","key":"10.1016\/j.knee.2021.06.003_b0170","doi-asserted-by":"crossref","first-page":"596","DOI":"10.1097\/MNM.0000000000000284","article-title":"Prediction of femoral head collapse in osteonecrosis using 18F-fluoride positron emission tomography","volume":"36","author":"Kubota","year":"2015","journal-title":"Nucl Med Commun"},{"key":"10.1016\/j.knee.2021.06.003_b0175","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1097\/00003086-198211000-00019","article-title":"The treatment of osteonecrosis of the medial femoral condyle","volume":"171","author":"Lotke","year":"1982","journal-title":"Clin Orthop Relat Res"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0180","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1016\/j.knee.2006.10.012","article-title":"Early MRI diagnosis and non-surgical management of spontaneous osteonecrosis of the knee","volume":"14","author":"Yates","year":"2007","journal-title":"Knee"},{"issue":"8","key":"10.1016\/j.knee.2021.06.003_b0185","doi-asserted-by":"crossref","first-page":"1805","DOI":"10.1007\/s00590-019-02513-4","article-title":"A novel suture technique to reduce the meniscus extrusion in the pullout repair for medial meniscus posterior root tears","volume":"29","author":"Okazaki","year":"2019","journal-title":"Eur J Orthop Surg Traumatol"},{"key":"10.1016\/j.knee.2021.06.003_b0190","doi-asserted-by":"crossref","DOI":"10.1007\/s00167-020-05953-2","article-title":"Medial meniscus posterior root repair restores the intra-articular volume of the medial meniscus by decreasing posteromedial extrusion at knee flexion","author":"Okazaki","year":"2020","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"issue":"2","key":"10.1016\/j.knee.2021.06.003_b0195","doi-asserted-by":"crossref","first-page":"383","DOI":"10.1007\/s00167-016-4359-8","article-title":"Non-operative management of medial meniscus posterior horn root tears is associated with worsening arthritis and poor clinical outcome at 5-year follow-up","volume":"25","author":"Krych","year":"2017","journal-title":"Knee Surg Sports Traumatol Arthrosc"}],"container-title":["The Knee"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0968016021001617?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0968016021001617?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,10,18]],"date-time":"2025-10-18T21:51:44Z","timestamp":1760824304000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0968016021001617"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,8]]},"references-count":39,"alternative-id":["S0968016021001617"],"URL":"https:\/\/doi.org\/10.1016\/j.knee.2021.06.003","relation":{},"ISSN":["0968-0160"],"issn-type":[{"value":"0968-0160","type":"print"}],"subject":[],"published":{"date-parts":[[2021,8]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Medial meniscus extrusion as a predictor for a poor prognosis in patients with spontaneous osteonecrosis of the knee","name":"articletitle","label":"Article Title"},{"value":"The Knee","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.knee.2021.06.003","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2021 Elsevier B.V. All rights reserved.","name":"copyright","label":"Copyright"}]}}