{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T16:04:50Z","timestamp":1761581090009,"version":"3.40.4"},"reference-count":8,"publisher":"BMJ","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["BMJ Case Reports"],"abstract":"<jats:p>Small renal or pararenal masses and retroperitoneum lesions are extremely difficult to diagnose. Imaging technology is a precious diagnostic tool; however, it places physicians in a difficult position since many lesions are not precisely diagnosed. Clinical and radiological findings can guide suspicion towards the diagnosis; however, in our current practice most diagnoses are based on histological findings. We aim to present a pararenal sclerosing perivascular epithelioid cell tumour (PEComa), a rare entity, whose diagnosis is only possible through invasive approaches and histological analysis. This rare lesion not only is difficult to diagnose but also has an uncertain behaviour, which is of major importance concerning its follow-up and prognosis. This case report is an attempt to add more data that will help establish criteria for diagnosis and follow-up of this rare disease.<\/jats:p>","DOI":"10.1136\/bcr-2013-009097","type":"journal-article","created":{"date-parts":[[2013,4,18]],"date-time":"2013-04-18T03:53:45Z","timestamp":1366257225000},"page":"bcr2013009097","source":"Crossref","is-referenced-by-count":3,"title":["Pararenal sclerosing PEComa"],"prefix":"10.1136","volume":"2013","author":[{"given":"Ricardo R","family":"Le\u00e3o","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bruno Jorge","family":"Pereira","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"V\u00e2nia","family":"Grenha","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hugo","family":"Coelho","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2013,4,17]]},"reference":[{"key":"2025042707253194000_2013.apr17_1.bcr2013009097.1","doi-asserted-by":"crossref","first-page":"306","DOI":"10.1111\/j.1440-1827.2008.02228.x","article-title":"Sclerosing variant of epithelioid angiomyolipoma","volume":"2013","author":"Matsuyama","year":"2008","journal-title":"Pathol Int"},{"key":"2025042707253194000_2013.apr17_1.bcr2013009097.2","doi-asserted-by":"crossref","first-page":"493","DOI":"10.1097\/PAS.0b013e318161dc34","article-title":"Sclerosing PEComa: clinicopathologic analysis of a distinctive variant with a predilection for the retroperitoneum","volume":"2013","author":"Hornick","year":"2008","journal-title":"Am J Surg Pathol"},{"key":"2025042707253194000_2013.apr17_1.bcr2013009097.3","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1111\/j.1365-2559.2005.02316.x","article-title":"PEComa: what do we know so far?","volume":"2013","author":"Hornick","year":"2006","journal-title":"Histopathology"},{"key":"2025042707253194000_2013.apr17_1.bcr2013009097.4","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1007\/s00428-008-0581-1","article-title":"A case of pararenal PEComa with extensive bone metaplasia","volume":"2013","author":"Menendez","year":"2008","journal-title":"Virchows Arch"},{"key":"2025042707253194000_2013.apr17_1.bcr2013009097.5","doi-asserted-by":"crossref","first-page":"463","DOI":"10.1007\/s00428-007-0378-7","article-title":"Perivascular epithelioid cell neoplasms (PEComas): four malignant cases expanding the histopathological spectrum and a description of a unique finding","volume":"2013","author":"Weinreb","year":"2007","journal-title":"Virchows Arch"},{"key":"2025042707253194000_2013.apr17_1.bcr2013009097.6","doi-asserted-by":"crossref","first-page":"589","DOI":"10.1097\/PGP.0b013e3181a3a4de","article-title":"Malignant variant of sclerosing perivascular epithelioid cell tumor arising in the adnexa","volume":"2013","author":"Ramaiah","year":"2009","journal-title":"Int J Gynecol Pathol"},{"key":"2025042707253194000_2013.apr17_1.bcr2013009097.7","doi-asserted-by":"crossref","first-page":"304","DOI":"10.1097\/PAS.0b013e3181854929","article-title":"Perivascular epithelioid cell tumor (PEComa) of the urinary bladder: report of 3 cases and review of the literature","volume":"2013","author":"Sukov","year":"2009","journal-title":"Am J Surg Pathol"},{"key":"2025042707253194000_2013.apr17_1.bcr2013009097.8","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1016\/S0242-6498(04)93964-8","article-title":"A large para-renal PEComa","volume":"2013","author":"Audard","year":"2004","journal-title":"Ann Pathol"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2013-009097","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,27]],"date-time":"2025-04-27T14:25:39Z","timestamp":1745763939000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2013-009097"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,4,17]]},"references-count":8,"alternative-id":["10.1136\/bcr-2013-009097"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2013-009097","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2013,4,17]]}}}