{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T19:29:16Z","timestamp":1785353356098,"version":"3.55.0"},"reference-count":13,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2015,6,4]],"date-time":"2015-06-04T00:00:00Z","timestamp":1433376000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2015,6,4]],"date-time":"2015-06-04T00:00:00Z","timestamp":1433376000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2015,6,4]],"date-time":"2015-06-04T00:00:00Z","timestamp":1433376000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"}],"content-domain":{"domain":["clinicalkey.jp","clinicalkey.com","clinicalkey.es","arthroscopyjournal.org","clinicalkey.com.au","clinicalkey.fr","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Arthroscopy"],"published-print":{"date-parts":[[2015,10]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To report the frequency of presentation of bifid or multiple iliopsoas tendons in patients who underwent endoscopic release for internal snapping hip syndrome (ISHS) and to compare both groups.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A consecutive series of patients with ISHS were treated with endoscopic transcapsular release of the iliopsoas tendon at the central compartment and prospectively followed up. The inclusion criteria were patients with a diagnosis of ISHS with failure of conservative treatment. During the procedure, the presence of a bifid tendon was intentionally looked for. Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores were evaluated preoperatively and at last follow\u2010up. Four patients presented with a bifid tendon and one patient had 3 tendons. At a minimum of 12 months' follow\u2010up, the presence of snapping recurrence was evaluated and the WOMAC scores were compared between both groups.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Among 279 hip arthroscopies, 28 patients underwent central transcapsular iliopsoas tendon release. The mean age was 29.25 years (range, 16 to 65 years; 6 left and 22 right hips). Group 1 included 5 patients with multiple tendons; the remaining patients formed group 2 (n\u00a0= 23). None of the patients presented with ISHS recurrence. The mean WOMAC score in group 1 was 39 points (95% confidence interval [CI], 26.2 to 55.4 points) preoperatively and 73.6 points (95% CI, 68.4 to 79.6 points) at last follow\u2010up. In group 2 the mean WOMAC score was 47.21 points (95% CI, 44.4 to 58.2 points) preoperatively and 77.91 points (95% CI, 67.8 to 83.4 points) at last follow\u2010up. We identified a bifid tendon retrospectively on magnetic resonance arthrograms in 3 of the 5 cases that were found to have multiple tendons during surgery. None of these were recognized before the procedures.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>In this series the surgeon intentionally looked for multiple tendons, which were found in 17.85% of the cases. Clinical results in patients with single\u2010 and multiple\u2010tendon snapping seem to be similarly adequate. However, the possibility of a type II error should be considered given the small number of patients.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level IV.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1016\/j.arthro.2015.04.083","type":"journal-article","created":{"date-parts":[[2015,6,5]],"date-time":"2015-06-05T19:15:16Z","timestamp":1433531716000},"page":"1991-1995","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":22,"title":["Internal Snapping Hip Syndrome: Incidence of Multiple\u2010Tendon Existence and Outcome After Endoscopic Transcapsular Release"],"prefix":"10.1002","volume":"31","author":[{"suffix":"Jr.","given":"Victor M.","family":"Ilizaliturri","sequence":"first","affiliation":[{"name":"Department of Adult Joint Reconstruction National Rehabilitation Institute of Mexico Mexico City Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos","family":"Suarez\u2010Ahedo","sequence":"additional","affiliation":[{"name":"Department of Adult Joint Reconstruction National Rehabilitation Institute of Mexico Mexico City Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marco","family":"Acu\u00f1a","sequence":"additional","affiliation":[{"name":"Department of Adult Joint Reconstruction National Rehabilitation Institute of Mexico Mexico City Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2015,6,4]]},"reference":[{"key":"e_1_2_2_2_2","doi-asserted-by":"publisher","DOI":"10.5435\/00124635-199509000-00006"},{"key":"e_1_2_2_3_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546508322130"},{"key":"e_1_2_2_4_2","first-page":"347","article-title":"Evaluation and management of the snapping iliopsoas tendon","volume":"55","author":"Byrd 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