46-year-old female with 2 sites of fat necrosis/coil cyst in the left reconstructed breast presents for follow-up study. Focused ultrasound is performed for the palpable lumps at left 9:00 position and left axillary tail.At left 9:00 position, again seen is a hypoechoic lesion measuring 5 x 3 x 5 mm with an internal hyperechoic clip, consistent with fat necrosis. There is no significant change in size or shape of this lesion.At left axillary tail, there is a similar hypoechoic lesion measuring 5 x 3 x 7 mm with an internal hyperechoic clip, consistent with fat necrosis. Size of this lesion is somewhat smaller than the prior study.
Benign fat necrosis at 9:00 position and axillary tail in the left breast.BIRADS: 2 - Benign finding.RECOMMENDATION: X - No Letter.