Figure 9c. Fibrothecoma in a 60-year-old woman. (a) Sagittal T2-weighted MR image shows a large, lobulated, entirely solid tumor (arrows). Although a supravaginal resection had been performed before the MR imaging examination, the remaining portion of the uterus is enlarged and cervical glands (arrowheads) show very high signal intensity. (b) Sagittal contrast-enhanced T1-weighted MR image shows that only the peripheral portion of the tumor (arrows) is weakly enhanced. A solid yellow mass was removed. (c) Low-power photomicrograph obtained with fat stain (oil red-O stain) reveals that the tumor cells contain abundant intracytoplasmic lipid within fibromatous tissue. (Reprinted, with permission, from reference 30.)