Sonographic findings of palpable isoechoic breast fat necrosis: look for skin integrity.

Fat necrosis is a cause of palpable breast lesions. Sonography is commonly used before mammography in young patients with palpable lumps. We describe a case of isoechoic breast fat necrosis that was detected because of extension to the skin. We are unaware of other reports of an isoechoic appearance of fat necrosis.