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Lupus panniculitis involving the breast
Josep M Sabaté1, Antonio Gómez, Sofía Torrubia
1Unity of Breast Imaging, Department of Diagnostic Radiology, Hospital de Sant Pau, Universitat Autònoma de Barcelona, Sant Antoni M. Claret 167, 08025, Barcelona, Spain. jsabate@hsp.santpau.es
European Radiology
|June 7, 2005
Summary
Lupus panniculitis, a rare condition affecting subcutaneous fat in systemic lupus erythematosus patients, can occur in the breast. This case highlights its unique imaging features on mammography, ultrasound, and MRI.
Area of Science:
- Immunodermatology
- Radiology
- Pathology
Background:
- Lupus panniculitis is a rare autoimmune disease targeting subcutaneous fat, seen in 2% of systemic lupus erythematosus patients.
- Breast involvement by lupus panniculitis is exceptionally uncommon.
Observation:
- A case of lupus panniculitis presenting as a suspicious breast mass with skin thickening was observed.
- Mammography showed an irregular mass in the subcutaneous fat; ultrasound revealed high echogenicity.
- Magnetic resonance (MR) imaging demonstrated high signal intensity on precontrast T1- and T2-weighted images.
Findings:
- Dynamic contrast-enhanced MR imaging revealed a focal mass with irregular margins and rim enhancement.
- A type 3 time-signal intensity curve was noted on dynamic contrast-enhanced MR imaging.
- The imaging findings necessitated differentiation from breast carcinoma and fat necrosis.
Implications:
- This case expands the understanding of lupus panniculitis imaging characteristics, particularly in the breast.
- Accurate diagnosis relies on integrating mammography, ultrasound, and advanced MR imaging findings.
- Core biopsy is crucial for definitive diagnosis and guiding management of suspected lupus panniculitis.