Figure 5a. Stage Ib endometrial carcinoma in a 57-year-old postmenopausal woman. (a) Sagittal T2-weighted MR image (3,000/85) shows no definite endometrial mass, a finding that incorrectly suggests stage Ia disease. (b) Sagittal gadolinium-enhanced T1-weighted MR image (450/11) shows a discrete hypointense mass (arrow) with invasion of the myometrium to less than half of its depth, findings that correctly suggest stage Ib disease. The histopathologic result corresponded to that of gadolinium-enhanced T1-weighted imaging.