Figure 13a.  T2-weighted fast spin-echo MR image (4,000/120) (a) and contrast-enhanced fast multiplanar spoiled gradient-echo MR image (50/6, 60° flip angle) (b) show an irregular mass (arrows) with nonenhancing internal septations in a 36-year-old woman with a palpable mass who proved to have fibrocystic change. The mass contains discrete cysts that have high T2 signal and do not enhance centrally with contrast material.