What is the appearance of fat necrosis on magnetic resonance mammography (breast MRI) following surgery?

Updated: Feb 25, 2019
  • Author: Preeti Gupta, MD, FRCR; Chief Editor: Eugene C Lin, MD  more...
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Answer

Answer

Fat necrosis can be seen with any trauma to the breast, including image-guided or surgical interventions. The MRI appearance of fat necrosis can be variable. Fat necrosis can present as oil cyst, calcification, spiculated mass, and architectural distortion. The enhancement pattern on MRI can be very variable. Correlation with the site of surgery and mammography is important. Central T1 hyperintensity within an abnormal enhancing area helps confirm the diagnosis of fat necrosis. If the lesion has suspicious morphology and enhancement, biopsy may be required to differentiate fat necrosis from cancer. [71]


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