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Birad category 4
Am 73 year old female with history of excision of benign cyst in 1975, normal mammograms every 1-2 years since then.  Had needle biopsy today and should have results within 5 days.  Recent sonogram revealed birad category 04 "irregular hypoechoic solid mass at 12:00 position."  Please interpret finding, and explain percentage risk of this being a malignancy.  I've already been advised by the radiologist to see a surgeon for an opinion.
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242527 tn?1292452740
Dear Grace524:  An irregular hypoechoic solid mass means that the mass is not perfectly round, is solid (hypoechoic means that sound waves will not pass through).  BIRAD 4 means suspicious for cancer and that a biopsy is recommended.  Depending on the source you read and radiologist categorization, the risk of a BIRAD 4 being malignant is between 25% and 50%.
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