{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T21:51:26Z","timestamp":1792014686057,"version":"4.4.0"},"reference-count":19,"publisher":"BMJ","issue":"7","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2020,6,12]]},"published-print":{"date-parts":[[2020,7]]},"abstract":"<jats:p>Psoas abscess is a rare and occasionally life-threatening condition. In the past, the major cause of psoas abscess was a descending infection originating from spine tuberculosis (Pott\u2019s disease). Subsequently, secondary infection from spondylodiscitis or Crohn\u2019s disease has become the prevalent aetiology. Conventional treatment ranges from antibiotic therapy alone to CT-guided and\/or surgical drainage. We present the case of a 67-year-old man with a complex history, including pneumonia, sepsis and previous muscle-skeletal trauma. The patient subsequently developed a psoas abscess that was successfully treated with a minimally invasive retroperitoneoscopic approach and antibiotics. Blood cultures and pus yielded Gram-positive <jats:italic>Streptococcus<\/jats:italic> sp, and transesophageal echocardiography identified endocarditis as a possible source of sepsis. Postoperative clinical course was complicated by recurrent sepsis that required a change of antibiotic therapy. The patient was eventually discharged to rehabilitation care without further complications. The retroperitoneoscopic approach is safe and effective for the treatment of cryptogenic psoas abscess.<\/jats:p>","DOI":"10.1136\/bcr-2020-235579","type":"journal-article","created":{"date-parts":[[2020,7,9]],"date-time":"2020-07-09T02:14:45Z","timestamp":1594260885000},"page":"e235579","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":5,"title":["Retroperitoneoscopic drainage of cryptogenic psoas abscess"],"prefix":"10.1136","volume":"13","author":[{"given":"Caterina","family":"Froiio","sequence":"first","affiliation":[{"name":"Surgery, Universita degli Studi di Milano, Milano, Italy"},{"name":"IRCCS Policlinico San Donato, San Donato Milanese, Lombardia, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1109-7974","authenticated-orcid":false,"given":"Daniele Tiziano","family":"Bernardi","sequence":"additional","affiliation":[{"name":"IRCCS Policlinico San Donato, San Donato Milanese, Lombardia, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emanuele","family":"Asti","sequence":"additional","affiliation":[{"name":"Surgery, IRCCS Policlinico San Donato, San Donato Milanese, Lombardia, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4880-1670","authenticated-orcid":false,"given":"Luigi","family":"Bonavina","sequence":"additional","affiliation":[{"name":"Department of General Surgery, IRCCS Policlinico San Donato, University of Milan, Milano, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2020,7,8]]},"reference":[{"key":"2025082707413589000_13.7.e235579.1","first-page":"202","article-title":"Acute psoitis","volume":"21","author":"Mynter","year":"1881","journal-title":"Buffalo Med Surg 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