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Preoperatively and at final follow\u2010up, thorough physical examination was performed and clinical outcomes (American Shoulder and Elbow Surgeons [ASES] score; University of California, Los Angeles [UCLA] score; visual analogue scale [VAS] for pain; and Simple Shoulder Test [SST]) were recorded. Features of pre\u2010operative magnetic resonance image (MRI) such as high signalling within the tendon substance, communication to the bicipital groove and long head of biceps tendon (LHBT) lesions were investigated. Characteristics of arthroscopic view were investigated. Bear\u2010hug and internal rotation resistance test at 90\u00b0 abduction and external rotation (IRRT90\u00b0) test were used to assess the SSC strength.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The mean follow\u2010up was 2.4 (2\u20133) years. The prevalence of arthroscopically confirmed inSSC tears was 69\/675 (10.2%) among arthroscopic rotator cuff repairs. Pre\u2010operative physical examination found positive IRRT90\u00b0 and bear\u2010hug test in 41\/60 (68.3%) and 42\/69 (60.8%) patients, respectively. The Cohen kappa coefficient was interpreted to be substantial for the evaluation of all MRI parameters. According to the conditions of LHBT, inSSC tears were classified into 3 types: type I: without LHBT subluxation and tear; type II: with LHBT subluxation or tears and type III: with LHBT dislocation. At final follow\u2010up, mean ASES, UCLA, VAS, and SST scores improved significantly from mean of 50.6\u2009\u00b1\u200914.7, 19.4\u2009\u00b1\u20093.07, 6.2\u2009\u00b1\u20092.0, and 6.1\u2009\u00b1\u20092.5 to mean of 90.7\u2009\u00b1\u20099.5, 32.2\u2009\u00b1\u20091.8, 1.4\u2009\u00b1\u20091.2 and 9.8\u2009\u00b1\u20092.2, respectively (<jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001). Bilateral symmetric strength was found by bear\u2010hug and IRRT90\u00b0 test in all patients postoperatively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Understanding features of pre\u2010operative MRI, physical examination and arthroscopic view is helpful to identify inSSC tears. Arthroscopic repair yielded satisfactory clinical outcomes in patients with inSSC tears.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>Level IV.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-022-07262-2","type":"journal-article","created":{"date-parts":[[2022,12,1]],"date-time":"2022-12-01T08:15:11Z","timestamp":1669882511000},"page":"1970-1977","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["The prevalence, classification, radiological and arthroscopic findings of intratendinous subscapularis tears"],"prefix":"10.1002","volume":"31","author":[{"given":"Lin","family":"Lin","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Institute of Sports Medicine Peking University Third Hospital No.49, North Garden Road, Haidian District 100191 Beijing People\u2019s Republic of China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lihua","family":"Zhang","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Department of Radiology Peking University Third Hospital No.49, North Garden Road, Haidian District 100191 Beijing People\u2019s Republic of China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guoqing","family":"Cui","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Institute of Sports Medicine Peking University Third Hospital No.49, North Garden Road, Haidian District 100191 Beijing People\u2019s Republic of China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hui","family":"Yan","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Institute of Sports Medicine Peking University Third Hospital No.49, North Garden Road, Haidian District 100191 Beijing People\u2019s Republic of China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2022,12]]},"reference":[{"key":"e_1_2_10_2_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623\u2010200706000\u201000005"},{"key":"e_1_2_10_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.otsr.2012.10.003"},{"key":"e_1_2_10_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2014.08.015"},{"key":"e_1_2_10_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jseint.2021.09.002"},{"key":"e_1_2_10_6_2","doi-asserted-by":"publisher","DOI":"10.5435\/JAAOS\u2010D\u201021\u201000155"},{"key":"e_1_2_10_7_2","doi-asserted-by":"crossref","unstructured":"YoonTH KimSJ ChoiYR ChoJT ChunYMArthroscopic Revision Rotator Cuff Repair: The Role of Previously Neglected Subscapularis Tears.Am J Sports Med(2021)10.1177\/03635465211047485363546521104748534694163","DOI":"10.1177\/03635465211047485"},{"key":"e_1_2_10_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcot.2022.101867"},{"key":"e_1_2_10_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.eats.2014.09.005"},{"key":"e_1_2_10_10_2","unstructured":"KimJH DoWS LimJR YoonTH ChunYMSubscapularis tendon tears hidden by the medial biceps sling can be missed on arthroscopic examination.Arch Orthop Trauma Surg(2022)10.1007\/s00402\u2010022\u201004681\u2010136471020"},{"key":"e_1_2_10_11_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167\u2010014\u20103243\u20107"},{"key":"e_1_2_10_12_2","first-page":"177","article-title":"interstitial tear of the subscapularis tendon, arthroscopic findings and technique of repair","volume":"4","author":"Saremi H","year":"2016","journal-title":"Arch Bone Jt Surg"},{"key":"e_1_2_10_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1058\u20102746(09)80020\u20107"},{"key":"e_1_2_10_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.eats.2013.05.007"},{"key":"e_1_2_10_15_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.eats.2016.04.010"},{"key":"e_1_2_10_16_2","doi-asserted-by":"publisher","DOI":"10.1177\/2325967119898123"},{"key":"e_1_2_10_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2021.04.040"},{"key":"e_1_2_10_18_2","unstructured":"CamenzindRS Martin BecerraJ TondelliTO GossingL Serane\u2010FresnelJ LafosseTet al. 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