Short term follow-up ultrasound for a probable area of fat necrosis. Per the patient, this area was easily palpable in the past and has now completely resolved to her. A targeted left ultrasound was performed at the site of the previously palpable abnormality. At the site of previous palpable concern, in the left breast 10:00 position, there is a mixed echogenicity circumscribed lesion with hyperechoic components measuring 5 x 4 mm compatible with resolving fat necrosis/oil cyst formation. Note that though the current measurements are slightly larger than the prior measurements reported, the prior measurements included only the central cystic component and not the surrounding hyperechoic fat necrosis. When the surrounding hyperechoic areas included on the old exam, the finding previously measured up to 9 mm.
Resolving fat necrosis/oil cyst formation. As long as the patient's physical examination remains normal and no palpable abnormality can be re-appreciated at this site, routine clinical follow-up is recommended.BIRADS: 2 - Benign finding.RECOMMENDATION: C - Clinical Correlation Needed.