Which findings on magnetic resonance mammography (breast MRI) are characteristic of mucinous or colloid carcinoma?

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

Answer

Mucinous or colloid carcinoma may be well defined, with a lobulated border and homogeneous enhancement. Superficially, these tumors may resemble a large fibroadenoma. However, these lesions are typically round rather than oval. Enhancing internal septa may be visible; if present, malignancy can be correctly diagnosed. [41] In rare cases, if an excess of mucin is present with relatively little malignant tissue, enhancement may be unremarkable or even absent.


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