{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T05:04:54Z","timestamp":1789621494430,"version":"build-2803163510"},"reference-count":39,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T00:00:00Z","timestamp":1789603200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Med."],"abstract":"\n Background<\/jats:title>\n The Morel-Lavall\u00e9e lesion (MLL) is a closed soft tissue avulsion injury resulting from shear force trauma. Chronic Morel-Lavall\u00e9e lesions present significant management challenges due to the formation of fibrous caps, persistent fluid accumulation, and a tendency for recurrence. Nevertheless, the pathogenesis and imaging characteristics of these lesions remain poorly understood.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n This study presents a case of a chronic Morel-Lavall\u00e9e lesion located in the right hip, with a disease progression lasting over 10 years. The MRI characteristics of the lesion were compared across different stages. The patient underwent open resection of the lesion, along with excision of excess skin and subcutaneous tissue, followed by negative-pressure drainage surgery. The efficacy of the treatment was evaluated through a 1-year postoperative follow-up.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n MRI examinations at different time points revealed a progression of the lesion from a chronic organized hematoma (Mellado-Bencardino classification Type III) to a coexistence of a chronic organized hematoma (Type III) and subacute hematoma-like lesions (Type II), indicating dynamic progression rather than static stability of the chronic Morel-Lavall\u00e9e lesion. Characteristic MRI findings included hematoma organization, fibrous capsule formation, round fat globules or fat septa, and layered fluid distribution within the cyst. Open surgery achieved complete resection of the lesion along with excess skin and subcutaneous tissue, followed by negative-pressure drainage, resulting in excellent wound healing; no recurrence was observed during the one-year follow-up, and hip joint function remained normal.<\/jats:p>\n <\/jats:sec>\n \n Conclusion<\/jats:title>\n The chronic progression of Morel-Lavall\u00e9e lesions is a dynamic process characterized by MRI findings such as fat globules or fat septa, fluid level stratification, hematoma organization, and capsule formation, all of which aid in definitive diagnosis. For large, recurrent chronic Morel-Lavall\u00e9e lesions, open surgical resection of the lesion, along with the excision of excess skin and subcutaneous tissue, combined with adequate negative pressure drainage, effectively eliminates dead space and reduces the risk of recurrence.<\/jats:p>\n <\/jats:sec>","DOI":"10.3389\/fmed.2026.1948713","type":"journal-article","created":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T04:46:57Z","timestamp":1789620417000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Case Report: Chronic Morel-Lavall\u00e9e lesion: dynamic MRI progression, histopathological findings and surgical treatment"],"prefix":"10.3389","volume":"13","author":[{"given":"Bingyan","family":"Mao","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery, The People\u02b9s Hospital of Shimen County (Shimen Hospital of Changsha Medical University)","place":["Changde, Hunan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cheng","family":"Ma","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, The People\u02b9s Hospital of Shimen County (Shimen Hospital of Changsha Medical University)","place":["Changde, Hunan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jicai","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, The People\u02b9s Hospital of Shimen County (Shimen Hospital of Changsha Medical University)","place":["Changde, Hunan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zuoquan","family":"Qin","sequence":"additional","affiliation":[{"name":"Medical Imaging Center, The People\u02b9s Hospital of Shimen County (Shimen Hospital of Changsha Medical University)","place":["Changde, Hunan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shenke","family":"Xie","sequence":"additional","affiliation":[{"name":"Pathology Department, The People\u02b9s Hospital of Shimen County (Shimen Hospital of Changsha Medical University)","place":["Changde, Hunan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,9,17]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"e14","DOI":"10.1097\/BOT.0000000000003005","article-title":"Characteristics, patterns and optimal treatment strategies of Morel-Lavallee lesions: a systematic review","author":"Bouchard","year":"2025","journal-title":"J Orthop Trauma"},{"key":"B2","doi-asserted-by":"publisher","first-page":"1639073","DOI":"10.3389\/fsurg.2025.1639073","article-title":"Giant Morel-Lavall\u00e9e lesion complicated with open pelvic fracture: a rare case report","volume":"12","author":"Li","year":"2025","journal-title":"Front 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