A 55-year-old woman presented with I-year history of mass in the right brea
st. Incisional biopsy showed the tumor to be malignant hemangiopericytoma f
rom its histology. The tumor showed low-intermediate density and peripheral
contrast enhancement on CT, and inhomogeneous mixed-signal intensity both
on T1W and T2W images, and peripheral enhancement with Gd-DTPA on MRT with
no invasion of the duct.