43 year old female with known left breast cancer status post neoadjuvant chemotherapy and positive left axillary lymph node. Personal history of benign left breast biopsies for tubular adenoma and fibroadenoma and benign right axillary lymph node biopsy. There is heterogeneous amount of fibroglandular tissue in both breasts.Mild parenchymal enhancement is noted bilaterally.LEFT BREAST: In the left superior breast, at site of known malignancy, there is revisualization of an irregular enhancing mass measuring 11 x 15 x 12 mm (AP x ML x SI: previously 23 x 17 x 19 mm). Biopsy marker clip is located centrally within this malignancy. Degree of enhancement has significantly reduced.Biopsy-proven tubular adenoma (5:00 position) and biopsy-proven fibroadenoma (9:00 position) of the left breast are unchanged.RIGHT BREAST:No abnormal enhancement is seen in right breast. No abnormal lymph nodes are identified in either axillary region.AXILLA: The two biopsied left axillary lymph nodes measure 17 x 7 mm and 8 x 6 mm respectively (previously 17 x 7 mm and 11 x 5 mm). Right axillary lymph nodes including biopsy proven benign lymph nodes appear unchanged.
1. Interval decrease in size of left breast index malignancy and stable - mild decrease in size of left axillary lymph nodes.2. No MR evidence of malignancy in the right breast.3. Stable biopsy-proven tubular adenoma and fibroadenoma of the left breast.BIRADS: 6 - Known cancer.RECOMMENDATION: X - No Letter.