Sonographic findings of endometrial stromal sarcoma that presented as a mural mass in patient 2.A heterogeneously echoic mass with an ill defined margin is noted in the uterine wall (thick arrows). The endometrium is displaced by the mass (thin arrows). Color Doppler sonography demonstrates a focally dispersed vascularity within the mass.Pathology revealed a subendometrial endometrial stromal sarcoma invading more than half of the myometrial thickness (not shown).