Figure 18.

Serial right breast MLO mammogram images (a–e) in a patient with a seat belt injury after a motor vehicle collision where the patient was in the driver seat in 2011 (a). In 2012 the classic described non‐ducal band‐like pattern and location of fat necrosis in the upper right breast was seen (a). An asymmetry developed in 2012 (b), with initial diagnostic evaluation attributing the findings to fat necrosis in the setting of trauma. Subsequent images (c–e) show the normal evolution of fat necrosis into oil cysts in a band‐like orientation, which slowly retracts over several years. Abbreviation: MLO, Mediolateral Oblique.