Chamisa, I.2010-06-142010-06-142010-01Chamisa, I 2010, 'Pseudomyxoma extraperitonei of ovarian origin mimicking a psoas abscess', Gynecol Surg, doi:10.1007/s10397-010-0551-x1613-207610.1007/s10397-010-0551-xhttp://hdl.handle.net/2263/14256Pseudomyxoma peritonei (PMP) is a rare condition consisting of mucinous ascites, most commonly arising from mucinous tumours of the appendix and occasionally from the ovary. Very rarely, mucinous deposits arise in the retroperitoneum without intraperitoneal involvement. This has been termed pseudomyxoma extraperitonei (PME). Our 48-year-old female patient presented with PME mimicking a psoas abscess for which retroperitoneal exploration and biopsy was done with accidental breach of the peritoneum. She declined further surgery and re-presented 4 years later with disseminated PMP. She underwent debulking surgery including right oophorectomy which was confirmed as the primary tumour source.enSpringerPseudomyxoma peritoneiPsoas abscessPseudomyxoma extraperitoneiRetroperitoneal mucinous adenocarcinomaPostprint Article