A Case of Large Retroperitoneal Lipoma Mimicking Liposarcoma.
10.4166/kjg.2010.55.6.394
- Author:
Kyoung Rok LEE
1
;
Tae Jin SEO
;
Jun Ho CHO
;
Hyung Il KIM
;
Young Hoi HUR
;
Sung Bum CHO
;
Wan Sik LEE
;
Young Eun JOO
Author Information
1. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea. yejoo@chonnam.ac.kr
- Publication Type:Case Report ; English Abstract
- Keywords:
Retroperitoneum;
Lipoma;
Liposarcoma;
Fat necrosis
- MeSH:
Fluorodeoxyglucose F18/diagnostic use;
Humans;
Lipoma/*diagnosis/pathology;
Liposarcoma/diagnosis;
Male;
Middle Aged;
Positron-Emission Tomography;
Retroperitoneal Neoplasms/*diagnosis/pathology;
Tomography, X-Ray Computed
- From:The Korean Journal of Gastroenterology
2010;55(6):394-398
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Lipomas are the most common benign tumors of adipose tissue among adults. Lipomas can occur almost anywhere in the trunk, extremities, mediastinum, and pelvis, but retroperitoneal lipomas are extremely rare. It should be distinguished from well differentiated liposarcoma in order to provide the appropriate treatment and follow up. We experienced a case of 60-year-old patient with large retroperitoneal lipoma mimicking liposarcoma causing palpable abdominal mass and pain. Abdominal computerized tomography (CT) showed 33x22 cm sized bulky fat-containing mass with contrast enhanced solid portion in right retroperitoneum. Positron emission tomograpgy (PET) revealed increased 18F-FDG uptake at solid portion shown in abdominal CT. Imaging studies confirmed a high index of suspicion on liposarcoma. Laparotomy showed a large encapsulating tumor arising from retroperitoneum with fat necrosis. Pathologic examination of resected specimen revealed normal mature adipocytes without atypical cells, compatible with lipoma.
