{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,16]],"date-time":"2026-04-16T13:23:25Z","timestamp":1776345805339,"version":"3.51.2"},"reference-count":14,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2015,5,27]],"date-time":"2015-05-27T00:00:00Z","timestamp":1432684800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pain Practice"],"published-print":{"date-parts":[[2015,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Acromioclavicular joint (<jats:styled-content style=\"fixed-case\">ACJ<\/jats:styled-content>) cysts are uncommon causes of shoulder pain. Type 1 <jats:styled-content style=\"fixed-case\">ACJ<\/jats:styled-content> cysts are limited to the <jats:styled-content style=\"fixed-case\">ACJ<\/jats:styled-content> and form in the presence of intact rotator cuff musculature, while type 2 cysts form secondary to biomechanical instability following rotator cuff tear or rupture.<\/jats:p><\/jats:sec><jats:sec><jats:title>Case Presentation<\/jats:title><jats:p>A 36\u2010year\u2010old overweight male with history of chronic left grade 2 (Rockwood classification) <jats:styled-content style=\"fixed-case\">ACJ<\/jats:styled-content> separation presented with intermittent pain at the distal superoanterior left clavicle. Physical examination revealed small step off at the <jats:styled-content style=\"fixed-case\">ACJ<\/jats:styled-content> and multiple subcutaneous cysts surrounding the <jats:styled-content style=\"fixed-case\">ACJ<\/jats:styled-content>. Ultrasound examination revealed a mild separation of the left <jats:styled-content style=\"fixed-case\">ACJ<\/jats:styled-content>, mild distension of the joint capsule, and a small, well\u2010circumscribed, compressible hypo\u2010echoic cyst overlying the clavicle. Palpation of the cyst against the clavicle reproduced the patient's symptoms of intermittent pain. He opted for ultrasound\u2010guided aspiration and subsequently had full resolution of his symptoms.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion<\/jats:title><jats:p>Musculoskeletal ultrasound is useful for diagnosis and management of refractory musculoskeletal conditions that are commonly misdiagnosed on physical examination and translucent to radiographic imaging. Musculoskeletal ultrasound allowed us to exclude rotator cuff pathology, identify <jats:styled-content style=\"fixed-case\">ACJ<\/jats:styled-content> cyst as the pain generator, classify it as a type 1 <jats:styled-content style=\"fixed-case\">ACJ<\/jats:styled-content> cyst, and aid in needle guidance for successful aspiration leading to full resolution of our patient's pain.<\/jats:p><\/jats:sec>","DOI":"10.1111\/papr.12316","type":"journal-article","created":{"date-parts":[[2015,5,27]],"date-time":"2015-05-27T16:29:52Z","timestamp":1432744192000},"source":"Crossref","is-referenced-by-count":5,"title":["Ultrasonography Leads to Accurate Diagnosis and Management of Painful Acromioclavicular Joint Cyst"],"prefix":"10.1111","volume":"15","author":[{"given":"George C.","family":"Chang Chien","sequence":"first","affiliation":[{"name":"Department of Pain Management Cleveland Clinic Foundation Anesthesiology Institute Cleveland Ohio U.S.A"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Craig S.","family":"Best","sequence":"additional","affiliation":[{"name":"Department of Physical Medicine &amp; Rehabilitation Rush University Medical Center Chicago Illinois U.S.A"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brian S.","family":"Clay","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology\u2014Pain Medicine University of Pittsburgh Medical Center Pittsburgh Pennsylvania U.S.A"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kenneth D.","family":"Candido","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology Advocate Illinois Masonic Medical Center Chicago Illinois U.S.A"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2015,5,27]]},"reference":[{"key":"e_1_2_4_2_1","doi-asserted-by":"publisher","DOI":"10.1136\/ard.57.11.649"},{"key":"e_1_2_4_3_1","doi-asserted-by":"publisher","DOI":"10.1136\/ard.54.12.959"},{"key":"e_1_2_4_4_1","doi-asserted-by":"publisher","DOI":"10.5435\/00124635-200904000-00002"},{"key":"e_1_2_4_5_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546512450162"},{"key":"e_1_2_4_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/ca.20918"},{"key":"e_1_2_4_7_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546513485359"},{"key":"e_1_2_4_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pmrj.2014.02.006"},{"key":"e_1_2_4_9_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546503261723"},{"key":"e_1_2_4_10_1","doi-asserted-by":"publisher","DOI":"10.1177\/03635465980260050201"},{"key":"e_1_2_4_11_1","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1097\/00003086-198412000-00027","article-title":"The geyser sign and torn rotator cuff: clinical\u00a0significance and pathomechanics","volume":"191","author":"Craig EV","year":"1984","journal-title":"Clin Orthop"},{"key":"e_1_2_4_12_1","first-page":"E118","article-title":"The MRI geyser sign: acromioclavicular joint cysts in the setting of a chronic rotator cuff tear","volume":"40","author":"Cooper HJ","year":"2011","journal-title":"Am J Orthop"},{"key":"e_1_2_4_13_1","doi-asserted-by":"publisher","DOI":"10.4076\/1757-1626-2-8388"},{"key":"e_1_2_4_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jse.2014.01.012"},{"key":"e_1_2_4_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pmrj.2010.06.009"}],"container-title":["Pain Practice"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fpapr.12316","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/papr.12316","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,1]],"date-time":"2023-10-01T08:27:45Z","timestamp":1696148865000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/papr.12316"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,5,27]]},"references-count":14,"journal-issue":{"issue":"7","published-print":{"date-parts":[[2015,9]]}},"alternative-id":["10.1111\/papr.12316"],"URL":"https:\/\/doi.org\/10.1111\/papr.12316","archive":["Portico"],"relation":{},"ISSN":["1530-7085","1533-2500"],"issn-type":[{"value":"1530-7085","type":"print"},{"value":"1533-2500","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,5,27]]}}}