Figure 2d. Left uterine artery aneurysm in an 18-year-old woman with habitual abortion. (a) Real-time gray-scale US image shows an anechoic lesion in the myometrium (arrow). (b) Power Doppler US image shows color signal within the lesion. (c) Color Doppler US image with spectral analysis demonstrates the lesion with a typical arterial flow pattern. (d) Arteriogram of the left common iliac artery shows a saccular aneurysm that protrudes from the left uterine artery.