{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T14:44:42Z","timestamp":1787755482203,"version":"build-2784847793"},"reference-count":11,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"3","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"<jats:sec>\n                    <jats:title>Case:<\/jats:title>\n                    <jats:p>A 62-year-old woman receiving romosozumab for 3 months underwent extreme lateral interbody fusion (XLIF) for lumbar degenerative spondylolisthesis. From 1 week after surgery, she experienced gradually increasing pain from the right groin to the front of the thigh. Examination revealed ossifying myositis in bilateral psoas major muscles. Etidronate treatment was initiated, improving pain after 4 days. Computed tomography showed lesion disappearance by 3 months after surgery.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>We report a rare case of myositis ossificans in bilateral psoas major muscles following XLIF surgery, possibly influenced by intraoperative manipulation and romosozumab treatment. Etidronate administration may be effective, as with heterotopic ossification.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2106\/jbjs.cc.23.00484","type":"journal-article","created":{"date-parts":[[2024,7,19]],"date-time":"2024-07-19T14:00:52Z","timestamp":1721397652000},"update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":2,"title":["Myositis Ossificans of the Psoas Major Muscle After XLIF With Preoperative Administration of Romosozumab"],"prefix":"10.2106","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-0930-5739","authenticated-orcid":false,"given":"Tsuyoki","family":"Ito","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery, The Jikei University School of Medicine, Minato-ku, Tokyo, 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