{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,22]],"date-time":"2025-10-22T10:34:50Z","timestamp":1761129290243,"version":"build-2065373602"},"reference-count":17,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2016,1,29]],"date-time":"2016-01-29T00:00:00Z","timestamp":1454025600000},"content-version":"vor","delay-in-days":28,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2016,1,1]],"date-time":"2016-01-01T00:00:00Z","timestamp":1451606400000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["J. exp. orthop."],"published-print":{"date-parts":[[2016,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>With the advent of MRI (Magnetic Resonance Imaging), Synovial lesions around knee are being more and more easily detected. Synovial lesions of knee present with boggy swelling, effusion, pain, and restriction of motion. Differential diagnoses of such lesions include pigmented villonodular synovitis, synovial lipoma, synovial chondromatosis, rheumatoid arthritis, synovial hemangioma, amyloid arthropathy, xanthomata and lipoma arborescens. CT and MRI often help in diagnosis of such lesions. MRI of Lipoma Arborescens has been regarded to have characteristic diagnostic appearance \u2013 it includes a synovial mass with frond\u2010like architecture and fat signal intensity on all pulse sequences. Sometimes Lipoma Arborescens can present in conjunction with inflammatory arthritis. Synovectomy is often curative for such conditions.<\/jats:p><\/jats:sec><jats:sec><jats:title>Findings<\/jats:title><jats:p>We report two cases where lesions diagnosed as Lipoma Arborescens on MRI subsequently revealed to be chronic inflammatory synovitis, characterized by absence of fat infiltration in histopathological examination \u2013 refuting the original diagnosis. There was infiltration of lymphocytes and neutrophils in the synovium, suggestive of chronic inflammatory arthritis. Both of these patients required management from rheumatologist, and had relief of symptoms after use of methotrexate and hydroxychloroquine. We also report a third case, where a loose body appearing as chondral fragment on arthroscopy was subsequently diagnosed as an organized hematoma on histopathological examination.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Diagnostic pitfalls after MRI of the knee is not uncommon. For example \u2010 normal variant of meniscomeniscal ligaments have been reported as meniscal tears; motion artifacts have been falsely reported as meniscal injuries; and meniscofemoral ligament can appear as free osteochondral fragment. In most of these cases, a routine arthroscopy is enough to clear the confusion. However, as evident in the three cases described here \u2010 in some synovial lesions of knee joint, even after MRI and arthroscopic examination, histopathological confirmation may still be prudent. In spite of availability of advanced imaging technologies and high definition arthroscopy equipment, an arthroscopy surgeon still must not forget the value of histopathological examination in establishing the true nature of synovial lesions of the knee joint.<\/jats:p><\/jats:sec>","DOI":"10.1186\/s40634-016-0039-3","type":"journal-article","created":{"date-parts":[[2016,1,28]],"date-time":"2016-01-28T20:20:39Z","timestamp":1454012439000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["It\u2019s not what it looks like: challenges in diagnosis of synovial lesions of the knee joint"],"prefix":"10.1002","volume":"3","author":[{"given":"Kumar Kaushik","family":"Dash","sequence":"first","affiliation":[{"name":"Department of Orthopaedics Grant Government Medical College &amp; Sir J.J. Group of Hospitals Byculla Mumbai India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Piyush Vishwas","family":"Gavai","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics Grant Government Medical College &amp; Sir J.J. Group of Hospitals Byculla Mumbai India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roshan","family":"Wade","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics Seth G.S. Medical College &amp; K.E.M. Hospital Parel Mumbai India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Amyn","family":"Rajani","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics Grant Government Medical College &amp; Sir J.J. Group of Hospitals Byculla Mumbai India"},{"name":"Breachcandy Hospital &amp; Saifee Hospital Mumbai India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2016,1,29]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1097\/00004728\u2010199011000\u201000039"},{"key":"e_1_2_10_3_1","first-page":"333","article-title":"Lipoma Arborescens of the Knee in a patient with Rheumatoid Arthritis","volume":"31","author":"Coll JP","year":"2011","journal-title":"Radio Graphics"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.5435\/JAAOS\u201020\u201012\u2010775"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.crad.2013.07.002"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1053\/jars.2002.36150"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167\u2010014\u20102996\u20103"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1302\/0301\u2010620X.80B2.8244"},{"issue":"3","key":"e_1_2_10_9_1","first-page":"3","article-title":"Thonse Chirag. 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