Renal Angiomyolipoma Mimicking a Well-Differentiated Retroperitoneal Liposarcoma
A 37-year-old Burmese woman presented with an incidentally found retroperitoneal fat-containing tumor. The tumor was 9 cm in the longest diameter, surrounding the right kidney, and composed of homogenous adipose tissue with thickened septum-like structures and spotty nonadipose structures, which wer...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Case Reports in Urology |
| Online Access: | http://dx.doi.org/10.1155/2020/8812057 |
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| _version_ | 1832546911498797056 |
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| author | Honoka Fuse Masaya Ito Kosuke Takemura Shuzo Ikuta Toru Motoi Tomotake Okuma Madoka Kataoka Fumitaka Koga |
| author_facet | Honoka Fuse Masaya Ito Kosuke Takemura Shuzo Ikuta Toru Motoi Tomotake Okuma Madoka Kataoka Fumitaka Koga |
| author_sort | Honoka Fuse |
| collection | DOAJ |
| description | A 37-year-old Burmese woman presented with an incidentally found retroperitoneal fat-containing tumor. The tumor was 9 cm in the longest diameter, surrounding the right kidney, and composed of homogenous adipose tissue with thickened septum-like structures and spotty nonadipose structures, which were enhanced on contrast-enhanced computed tomography and magnetic resonance imaging. The tumor did not show either a beak sign or synchronous angiomyolipoma-like lesion in the kidneys. The tumor had irregular septa, thin blood vessels, and spotty small soft-tissue nodules. The tumor did not contain any heterogeneously enhanced solid lesions suspicious for dedifferentiated liposarcomas. Based on these imaging findings, a clinical diagnosis of a well-differentiated liposarcoma was made. Under the consensus of a multidisciplinary cancer board, she was recommended to undergo core-needle biopsy to confirm the clinical diagnosis. However, she declined to undergo biopsy for financial reasons. She underwent kidney-sparing retroperitoneal tumor resection. Histopathologically, the tumor was an angiomyolipoma with positive immunostaining for HMB45 and Melan A. The present case suggests the importance of core-needle biopsy prior to surgical intervention for retroperitoneal fat-containing tumors. |
| format | Article |
| id | doaj-art-e73859677a8b4e869344878947baf8a7 |
| institution | Kabale University |
| issn | 2090-696X 2090-6978 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Case Reports in Urology |
| spelling | doaj-art-e73859677a8b4e869344878947baf8a72025-02-03T06:46:40ZengWileyCase Reports in Urology2090-696X2090-69782020-01-01202010.1155/2020/88120578812057Renal Angiomyolipoma Mimicking a Well-Differentiated Retroperitoneal LiposarcomaHonoka Fuse0Masaya Ito1Kosuke Takemura2Shuzo Ikuta3Toru Motoi4Tomotake Okuma5Madoka Kataoka6Fumitaka Koga7Department of Urology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, JapanDepartment of Urology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, JapanDepartment of Urology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, JapanDepartment of Radiology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, JapanDepartment of Pathology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, JapanDepartment of Musculoskeletal Oncology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, JapanDepartment of Urology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, JapanDepartment of Urology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, JapanA 37-year-old Burmese woman presented with an incidentally found retroperitoneal fat-containing tumor. The tumor was 9 cm in the longest diameter, surrounding the right kidney, and composed of homogenous adipose tissue with thickened septum-like structures and spotty nonadipose structures, which were enhanced on contrast-enhanced computed tomography and magnetic resonance imaging. The tumor did not show either a beak sign or synchronous angiomyolipoma-like lesion in the kidneys. The tumor had irregular septa, thin blood vessels, and spotty small soft-tissue nodules. The tumor did not contain any heterogeneously enhanced solid lesions suspicious for dedifferentiated liposarcomas. Based on these imaging findings, a clinical diagnosis of a well-differentiated liposarcoma was made. Under the consensus of a multidisciplinary cancer board, she was recommended to undergo core-needle biopsy to confirm the clinical diagnosis. However, she declined to undergo biopsy for financial reasons. She underwent kidney-sparing retroperitoneal tumor resection. Histopathologically, the tumor was an angiomyolipoma with positive immunostaining for HMB45 and Melan A. The present case suggests the importance of core-needle biopsy prior to surgical intervention for retroperitoneal fat-containing tumors.http://dx.doi.org/10.1155/2020/8812057 |
| spellingShingle | Honoka Fuse Masaya Ito Kosuke Takemura Shuzo Ikuta Toru Motoi Tomotake Okuma Madoka Kataoka Fumitaka Koga Renal Angiomyolipoma Mimicking a Well-Differentiated Retroperitoneal Liposarcoma Case Reports in Urology |
| title | Renal Angiomyolipoma Mimicking a Well-Differentiated Retroperitoneal Liposarcoma |
| title_full | Renal Angiomyolipoma Mimicking a Well-Differentiated Retroperitoneal Liposarcoma |
| title_fullStr | Renal Angiomyolipoma Mimicking a Well-Differentiated Retroperitoneal Liposarcoma |
| title_full_unstemmed | Renal Angiomyolipoma Mimicking a Well-Differentiated Retroperitoneal Liposarcoma |
| title_short | Renal Angiomyolipoma Mimicking a Well-Differentiated Retroperitoneal Liposarcoma |
| title_sort | renal angiomyolipoma mimicking a well differentiated retroperitoneal liposarcoma |
| url | http://dx.doi.org/10.1155/2020/8812057 |
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