J Korean Radiol Soc.
2000 Sep;43(3):343-348. 10.3348/jkrs.2000.43.3.343.
MR Imaging Findings of Intraosseous Lipoma
- Affiliations
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- 1Department of Radiology, School of Medicine, Catholic University of Taegu-Hyosung, Korea. yhlee@cuth.cataegu.ac.kr
- 2Department of Radiology, School of Medicine, Kyungpook National University, Korea.
- 3Department of Radiology, College of Medicine, Yeungnam University, Korea.
- KMID: 1832721
- DOI: http://doi.org/10.3348/jkrs.2000.43.3.343
Abstract
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PURPOSE: To evaluate the MR imaging findings of intraosseous lipoma.
MATERIALS AND METHODS
The MR imaging findings of 12 cases of intraosseous lipoma were retrospectively analyzed with regard to internal signal intensity, enhancement patterns, the presence of calcification and the status of the margin. The findings relating to these last two features were compared with those of plain films and CT.
RESULTS
Six tumors were located in the calcaneus, three in the tibia, two in the ilium, and one in the carpal lunate. A fat component was clearly identified in all cases, but no lesion was purely fatty. Cyst formation was noted in four cases, and hyperintense portions different from the cystic area were seen on T2WI in ten. Contrast enhancement was observed in four patients, and although plain film and CT images revealed, in all cases, the presence of calcification, in two cases this was not demonstrated by MRI. In all cases, however, MRI showed well-defined tumoral margins.
CONCLUSION
MRI clearly depicts fat and other components related to the involutional changes occurring in cases of intraosseous lipoma. The information these images provide is useful for the diagnosis and histologic classification of intraosseous lipoma.
