Figure 1. (A) Mammography performed before chemotherapy demonstrated an indistinct, high-density mass with pleomorphic calcification in the upper portion of the right breast. (B) Magnetic resonance imaging (MRI) before chemotherapy showed a lobulated mass with irregular margins and rapid enhancement during the early phase of the enhanced kinetics. The image demonstrated washout of the enhancement pattern during the delayed phase. (C) Mammography performed after chemotherapy showed the marked shrinkage of the mass with a microlobulated and partially irregular margin. (D) MRI after chemotherapy showed that the mass was considerably reduced.