Objective To evaluate the findings of fat necrosis in the breast.Methods 9 caes of fat necrosis of the breast proved by pathology and were reviewed.All patients underwent mammography,3 cases underwent plain CT and contrast-enhanced CT.Results The mammographic features of fat necrosis included: the lesion out of gland tissue showed multiple rope and node with fat density(7 cases);thelesion in gland tissue showed regular(1 case) and irregular mass(1 case).Conclusion The image has a higher accuracy than physicalexamination in distinguishing fat necrosis and breast carcinoma.Multiple rope and node with fat density is the typical signs of fat necrosis of the breast.