We report the magnetic resonance imaging (MRI) findings with a paramag
netic enhancement agent (gadopentetate dimeglumine (Gd-DTPA)) in a 70-
year-old woman with carcinosarcoma of the uterus. In the present patie
nt, the polypoid portion histologically most abundant in the sarcomato
us component was strongly enhanced by Gd-DTPA and was clearly demonstr
ated with high signal intensities on contrast-enhanced T-1-weighted im
ages. We suggest that MRI with Gd-DTPA may be clinically useful for de
tection of carcinosarcoma, and that any patient having endometrial car
cinoma with the polypoid portion, which is more strongly enhanced by G
d-DTPA within the tumor, may be suspected of carcinosarcoma.