- Benign, nonsuppurative inflammatory process
- Most common causes of fat necrosis are surgery (biopsy, lumpectomy, reduction mammoplasty, implant removal, breast reconstruction) and radiation therapy. Another important cause is trauma, including blunt chest trauma, seat belt injury, and even minor trauma that the patient may not recollect.
- Radiographic and clinical appearance of fat necrosis of the breast may be indistinguishable from that of malignancy
 Imaging Findings
- Mammographic spectrum of appearances of fat necrosis ranges from the characteristically benign to the potentially malignant.
- Calcifications seen at mammography may be clear-cut, benign rings, rims, or coarse macrocalcifications or may manifest as suspicious pleomorphic or even "branching type" microcalcifications.
- Masses are most commonly solid, although they may be complex or cystic.
- Borders may be discrete or ill-defined.
- Posterior shadowing or enhancement may be present.
- Signal follows that of fat: Bright on T1 with loss of signal of fat saturated images.
 External Links
- Dvora Cyrlak, and Philip M. Carpenter. Breast Imaging Case of the Day. RadioGraphics 1999 19: 80-83.
- JP Hogge, RE Robinson, CM Magnant, and RA Zuurbier. The mammographic spectrum of fat necrosis of the breast. RadioGraphics 1995 15: 1347-1356.