Figure 15a. Metastatic uterine leiomyosarcoma in a 43-year-old woman. (a) Sagittal T2-weighted fast SE MR image shows a poorly marginated mass of the posterior uterine body (arrows). The region of low signal intensity in the anterior part of the mass (*) represents high-volume flow within a draining vein. (b) Contrast-enhanced axial T1-weighted spoiled gradient-echo MR image shows bilateral pulmonary nodules (arrows). The lungs and liver are the most common sites of metastatic spread of uterine leiomyosarcoma (6,49). (c) Photograph of the cut specimen shows good MR imaging-histopathologic correlation of the infiltrating sarcoma (arrows). * = draining vein.