Fig. 2. Mammography images of post radiation sarcoma Fig. 2. Mammography images of post radiation sarcoma. At approximately 7 month after the initial CT scan, mammography is performed. Background breast shows heterogeneous density. About 4 cm sized mass is seen in the lower outer quadrant of the left breast in the 5 o'clock position. The mass is hyperdense and shows relatively irregular shape and indistinct margin with partial spiculation. However, calcification or architectural distortion is not seen (arrows). Fig. 2. Mammography images of post radiation sarcoma. At approximately 7 month after the initial CT scan, mammography is performed. Background breast shows heterogeneous density. About 4 cm sized mass is seen in the lower outer quadrant of the left breast in the 5 o'clock position. The mass is hyperdense and shows relatively irregular shape and indistinct margin with partial . . . J Korean Soc Radiol. 2015 Jul;73(1):53-57. http://dx.doi.org/10.3348/jksr.2015.73.1.53