{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T10:23:18Z","timestamp":1777890198177,"version":"3.51.4"},"reference-count":8,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2009,7,1]],"date-time":"2009-07-01T00:00:00Z","timestamp":1246406400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rare Tumors"],"published-print":{"date-parts":[[2009,7,14]]},"abstract":"<jats:p>Retroperitoneal benign lipomas are extremely rare and represent about 2.9% of all primary retroperitoneal tumors. About 80% of the tumors in the retroperitoneal cavities are malignant neoplasms. We experienced a case of a retroperitoneal lipoma simulating an ovarian mature cystic teratoma. A diagnosis was correctly made by magnetic resonance imaging (MRI) prior to surgery, and a total tumorectomy was performed. The retroperitoneal lipoma was recognized to have arisen from the urinary bladder. Histological sections revealed a tumor consisting of typical adipose cells without atypia. These types of lipomas should be carefully followed-up because they often recur and undergo malignant transformations.<\/jats:p>","DOI":"10.4081\/rt.2009.e13","type":"journal-article","created":{"date-parts":[[2009,8,1]],"date-time":"2009-08-01T09:31:34Z","timestamp":1249119094000},"page":"34-35","source":"Crossref","is-referenced-by-count":18,"title":["Retroperitoneal Lipoma Arising from the Urinary Bladder"],"prefix":"10.1177","volume":"1","author":[{"given":"Shingo","family":"Ukita","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology, Otsu Red-Cross, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masafumi","family":"Koshiyama","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Otsu Red-Cross, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Megumi","family":"Ohnaka","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and 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