{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,15]],"date-time":"2026-03-15T21:00:44Z","timestamp":1773608444064,"version":"3.50.1"},"reference-count":14,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2011,10,19]],"date-time":"2011-10-19T00:00:00Z","timestamp":1318982400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2011,10,19]],"date-time":"2011-10-19T00:00:00Z","timestamp":1318982400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2011,10,19]],"date-time":"2011-10-19T00:00:00Z","timestamp":1318982400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2011,10,19]],"date-time":"2011-10-19T00:00:00Z","timestamp":1318982400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"}],"content-domain":{"domain":["arthroscopyjournal.org","clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Arthroscopy"],"published-print":{"date-parts":[[2012,1]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To study the arthroscopic appearance and treatment of impingement cysts and to propose their potential intraoperative value for correct femoral osteochondroplasty in femoroacetabular impingement (FAI).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We performed a single\u2010surgeon, retrospective study of 152 consecutive hip arthroscopies in 141 patients treated for FAI due to cam, localized pincer, or mixed FAI. Radiographic (conventional radiographs and magnetic resonance arthrography) cyst sizes and locations as well as the arthroscopic appearance were recorded.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>On the preoperative radiographs, impingement cysts were radiographically visible in 18% of treated FAI patients (26 of 141); 15% of these patients (4 of 26) had more than 1 cyst. Age was the only independent predictor of cysts, with a 7\u2010year shift to a mean age of 42 years. The majority of cysts were located in the anterosuperior quadrant of the femoral head\u2010neck junction (93%), the mean diameter of cysts was 7.0 mm, with a range from 3.7 to 15.1 mm. During surgery, only a few were arthroscopically identifiable, with a pit\u2010like (3 of 26) or crater\u2010like appearance (3 of 26) (i.e., surface alterations) for the larger cysts. The majority of cysts (20 of 26) became evident, however, after unroofing of the area of cam FAI. Cysts were associated with labral (25 of 26) and\/or chondral lesions (23 of 26). Small cysts were completely removed during femoral osteochondroplasty, whereas larger cysts were only resected until impingement\u2010free range of motion was reached. No neck fractures occurred in this series.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Impingement cysts were present on 1 in 6 radiographs in patients undergoing hip arthroscopy for FAI and were found most commonly in older patients. The cysts predictably occur within the epicenter of the femoral\u2010induced impingement. Whereas surface alterations are rare (6 of 26), the content and base of the unroofed cyst are consistent. Most cysts are completely excised as part of the femoral impingement correction and may be used as a confirmation that arthroscopic cam resection has been performed at the correct site.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level IV, therapeutic case series.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1016\/j.arthro.2011.07.010","type":"journal-article","created":{"date-parts":[[2011,10,22]],"date-time":"2011-10-22T12:28:58Z","timestamp":1319286538000},"page":"66-73","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":14,"title":["Arthroscopic Appearance and Treatment of Impingement Cysts at Femoral Head\u2010Neck Junction"],"prefix":"10.1002","volume":"28","author":[{"given":"Michael","family":"Leunig","sequence":"first","affiliation":[{"name":"Department of Orthopedics Schulthess Clinic Zurich Switzerland"},{"name":"Orthopaedic Department University of Bern Bern Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nicholas H.","family":"Mast","sequence":"additional","affiliation":[{"name":"Department of Orthopedics Schulthess Clinic Zurich Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Franco M.","family":"Impellizerri","sequence":"additional","affiliation":[{"name":"Research Laboratory Schulthess Clinic Zurich Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Reinhold","family":"Ganz","sequence":"additional","affiliation":[{"name":"Orthopaedic Department University of Bern Bern Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carlo","family":"Panaro","sequence":"additional","affiliation":[{"name":"Department of Orthopedics Schulthess Clinic Zurich Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2011,10,19]]},"reference":[{"key":"e_1_2_2_2_1","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.138.6.1115"},{"key":"e_1_2_2_3_1","doi-asserted-by":"publisher","DOI":"10.1148\/radiol.2361040140"},{"key":"e_1_2_2_4_1","doi-asserted-by":"publisher","DOI":"10.1148\/radiol.2362041987"},{"key":"e_1_2_2_5_1","doi-asserted-by":"publisher","DOI":"10.1148\/radiol.2403050767"},{"key":"e_1_2_2_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00330-008-0952-7"},{"key":"e_1_2_2_7_1","doi-asserted-by":"publisher","DOI":"10.1148\/radiol.2382050165"},{"key":"e_1_2_2_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-008-0646-0"},{"key":"e_1_2_2_9_1","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.168.1.8976938"},{"key":"e_1_2_2_10_1","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.172.1.2740509"},{"key":"e_1_2_2_11_1","first-page":"210","article-title":"The young adult with hip impingement: Deciding on the optimal intervention","volume":"91","author":"Beaule P.E.","year":"2009","journal-title":"J Bone Joint Surg Am"},{"key":"e_1_2_2_12_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-008-0680-y"},{"key":"e_1_2_2_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2007.07.012"},{"key":"e_1_2_2_14_1","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-200704000-00025"},{"key":"e_1_2_2_15_1","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.D.01793"}],"container-title":["Arthroscopy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0749806311006748?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0749806311006748?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1016\/j.arthro.2011.07.010","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/full-xml\/10.1016\/j.arthro.2011.07.010","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1016\/j.arthro.2011.07.010","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,3,15]],"date-time":"2026-03-15T09:21:33Z","timestamp":1773566493000},"score":1,"resource":{"primary":{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/10.1016\/j.arthro.2011.07.010"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2011,10,19]]},"references-count":14,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2012,1]]}},"alternative-id":["10.1016\/j.arthro.2011.07.010"],"URL":"https:\/\/doi.org\/10.1016\/j.arthro.2011.07.010","archive":["Portico"],"relation":{},"ISSN":["0749-8063","1526-3231"],"issn-type":[{"value":"0749-8063","type":"print"},{"value":"1526-3231","type":"electronic"}],"subject":[],"published":{"date-parts":[[2011,10,19]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Arthroscopic Appearance and Treatment of Impingement Cysts at Femoral Head-Neck Junction","name":"articletitle","label":"Article Title"},{"value":"Arthroscopy: The Journal of Arthroscopic & Related Surgery","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.arthro.2011.07.010","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"Copyright \u00a9 2012 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.","name":"copyright","label":"Copyright"}]}}