Archived Case 36

This is classic fat necrosis, just like the last case, but is not yet calcified. Several lucent nodules are present in the upper outer right breast, with surrounding density, consistent with fat necrosis.

But here is the ultrasound:

Fat Necrosis looks ugly on ultrasound! It can be hypoechoic or mixed echogenicity, well- or poorly defined, and can have a lot of shadowing. The ultrasound pictures just confuse things, and may lead to an unneccessary biopsy, as happened in this case.

Just to give you another example, here is another classic example of fat necrosis: