{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,29]],"date-time":"2025-10-29T03:19:09Z","timestamp":1761707949970},"reference-count":15,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2006,9,20]],"date-time":"2006-09-20T00:00:00Z","timestamp":1158710400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pathology International"],"published-print":{"date-parts":[[2006,10]]},"abstract":"<jats:p>Reported herein is a case of retroperitoneal angiomyolipoma associated with amyloid deposition, masquerading as well\u2010differentiated liposarcoma. A 16\u2003\u00d7\u200313\u2003cm lipomatous tumor was resected from the perirenal retroperitoneum of a 71\u2010year\u2010old woman. Microscopically, the tumor was exclusively composed of mature adipose tissue and abnormal thick blood vessels, but bundles of smooth muscle were lacking. In addition, amyloid was deposited between fat cells. Initially, well\u2010differentiated liposarcoma was highly suspected. However, there were a few epithelioid cells with clear vacuolated cytoplasm within the vessel walls, which were immunoreactive for smooth muscle markers and HMB\u201045. Real\u2010time polymerase chain reaction failed to demonstrate the amplification of the <jats:italic>murine double\u2010minute type 2<\/jats:italic> gene and <jats:italic>cyclin\u2010dependent kinase 4<\/jats:italic> gene in this tumor. Therefore, the tumor was diagnosed as lipomatous angiomyolipoma. After the diagnosis, it was found that the patient had multiple myeloma and cardiac amyloidosis, suggesting that the amyloid deposition within the tumor was a complication of the myeloma. Lipomatous angiomyolipoma may be a diagnostic pitfall of retroperitoneal lipomatous tumors.<\/jats:p>","DOI":"10.1111\/j.1440-1827.2006.02021.x","type":"journal-article","created":{"date-parts":[[2006,9,20]],"date-time":"2006-09-20T09:24:03Z","timestamp":1158744243000},"page":"638-641","source":"Crossref","is-referenced-by-count":5,"title":["Retroperitoneal lipomatous angiomyolipoma associated with amyloid deposition masquerading as well\u2010differentiated liposarcoma"],"prefix":"10.1111","volume":"56","author":[{"given":"Shio","family":"Shimada","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Harada","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Keisuke","family":"Ishizawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takanori","family":"Hirose","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,9,20]]},"reference":[{"key":"e_1_2_6_2_2","first-page":"65","volume-title":"World Health Organization Classification of Tumours. 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