Which findings on magnetic resonance mammography (breast MRI) are characteristic of papillomas?

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

Answer

Papillomas are typically isointense on T1W images and isointense to slightly hyperintense on fat-suppressed T2W images. They enhance rapidly with contrast and can show variable delayed kinetics. High-resolution ultrasonography may be useful to determine whether the lesion is intraductal.

(See the image below.)

Breast papilloma. This nodule was detected at scre Breast papilloma. This nodule was detected at screening mammography. A, Sonogram shows a well-defined, rounded, hypoechoic nodule that is almost as tall as it is wide; this is suggestive of malignancy. Needle biopsy yielded papillary tissue. B, Dynamic contrast-enhanced MRI shows a rapidly enhancing, smoothly marginated, rounded nodule; this is similar to a malignancy, except for relatively weak and prolonged enhancement. The nodule still had good enhancement 10 minutes after the injection. Results of surgical excision biopsy confirmed a breast papilloma.

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