A case of pelvic hemangiopericytoma in a 59-year-old woman is reported. The
MR imaging features are presented. The tumor was unresectable and the pati
ent received postoperative irradiation of 4200 cGy on the pelvis. One year
after diagnosis, metastasis to a lumbar vertebra was discovered and additio
nal irradiation of 3900 cGy was applied. One year later CT showed control o
f the pelvic turner and its metastasis.