{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T00:05:40Z","timestamp":1756339540573,"version":"3.44.0"},"reference-count":22,"publisher":"BMJ","issue":"8","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2022,8,9]]},"published-print":{"date-parts":[[2022,8]]},"abstract":"<jats:p>Here, we report a case of malignant psoas syndrome presented to us during the second peak of the COVID-19 pandemic. Our patient had a medical history of hypertension, recently diagnosed with left iliac deep vein thrombosis and previous breast and endometrial cancers. She presented with exquisite pain and a fixed flexion deformity of the left hip. A rim-enhancing lesion was seen within the left psoas muscle and was initially deemed to be a psoas abscess. This failed to respond to medical management and attempts at drainage. Subsequent further imaging revealed the mass was of a malignant nature; histology revealing a probable carcinomatous origin. Following diagnosis, palliative input was obtained and, unfortunately, our patient passed away in a hospice shortly after discharge. We discuss the aetiology, radiological findings and potential treatments of this condition and learning points to prompt clinicians to consider this diagnosis in those with a personal history of cancer.<\/jats:p>","DOI":"10.1136\/bcr-2022-250654","type":"journal-article","created":{"date-parts":[[2022,8,19]],"date-time":"2022-08-19T11:16:20Z","timestamp":1660907780000},"page":"e250654","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Psoas muscle metastatic disease mimicking a psoas abscess on imaging"],"prefix":"10.1136","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0435-0839","authenticated-orcid":false,"given":"Christopher","family":"Gunn","sequence":"first","affiliation":[{"name":"Department of General Surgery, Wrightington Wigan and Leigh NHS Foundation Trust, Wigan, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mazyar","family":"Fani","sequence":"additional","affiliation":[{"name":"Department of General Surgery, Wrightington Wigan and Leigh NHS Foundation Trust, Wigan, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2022,8,19]]},"reference":[{"key":"2025082710104939000_15.8.e250654.1","doi-asserted-by":"crossref","first-page":"21","DOI":"10.1186\/1470-7330-14-21","article-title":"Muscle metastases: comparison of features in different primary tumours","volume":"14","author":"Surov","year":"2014","journal-title":"Cancer Imaging"},{"key":"2025082710104939000_15.8.e250654.2","doi-asserted-by":"publisher","DOI":"10.1007\/s00330-009-1577-1"},{"key":"2025082710104939000_15.8.e250654.3","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1007\/s12094-011-0625-x","article-title":"Muscle metastasis of 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