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Imaging features of fat necrosis
Lai Peng Chan1, R Gee, Ciaran Keogh
1Department of Diagnostic Radiology, Singapore General Hospital, Outram Rd., 169608 Singapore.
AJR. American Journal of Roentgenology
|September 23, 2003
Summary
Magnetic resonance imaging (MRI) findings for fat necrosis are more varied than previously understood. Classic MRI signs were infrequent, with new peripheral contrast enhancement patterns observed in this study.
Area of Science:
- Radiology
- Medical Imaging
- Pathology
Background:
- Fat necrosis is a condition involving the death of adipose tissue.
- Accurate diagnosis of fat necrosis is crucial for appropriate patient management.
- Magnetic resonance imaging (MRI) is a key modality for evaluating soft tissue abnormalities.
Purpose of the Study:
- To describe the imaging characteristics of biopsy-proven fat necrosis.
- To emphasize the role and findings of MRI in diagnosing fat necrosis.
- To review the existing literature on MRI findings in fat necrosis.
Main Methods:
- Case series of five patients with biopsy-proven fat necrosis.
- Detailed review of MRI scans for all included cases.
- Literature review of previously reported MRI findings for fat necrosis.
Main Results:
- The classically reported MRI finding (central high signal intensity with a low-signal-intensity rim) was present in only 2 out of 5 cases.
- Peripheral contrast enhancement, a previously unreported finding, was observed in 3 out of 5 cases.
- Additional observed MRI patterns included amorphous, cloudlike stranding and a serpentine appearance.
Conclusions:
- The MRI appearance of fat necrosis is more diverse than previously documented.
- Reliance on classic MRI findings alone may lead to underdiagnosis.
- Recognition of varied imaging patterns, including peripheral enhancement, is essential for accurate MRI interpretation of fat necrosis.