48-year-old woman with breast cancer metastatic to brain.
A, Sagittal 3D T1-weighted magnetization-prepared rapid acquisition gradient echo gadolinium-enhanced MR image, obtained according to protocol, shows multiple brain metastases (arrows).
B, Sagittal 3D T1-weighted magnetization-prepared rapid acquisition gradient echo ferumoxytol-enhanced MR image acquired 1 day after image in A shows multiple brain metastases (arrows). Larger size of right basal ganglia lesion may be due to perilesional macrophages or inflammation.