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Fig. 4C —64-year-old woman with the history of cancer in upper outer quadrant after lumpectomy for breast cancer and subsequent benign biopsy in the medial breast showing fat necrosis. Patient presents for evaluation of a new palpable left medial breast mass. Mammographic findings are benign. Kinetic analysis shows slow initial enhancement and mild delayed washout. Clinical management: Biopsy was performed because of palpable findings, isolated enhancement, and patient risk factors. Based on our current understanding of MRI appearances of fat necrosis, this lesion could have been followed up because of the proximity to the previous biopsy site. Histology showed fibrosis, fat necrosis, and chronic inflammation.