Figure 21b. Bilateral invasive ovarian cancer in a 74-year-old woman. (a) Anteroposterior IVU image shows a large mass (M) of soft-tissue arising from the pelvis and partially obstructing the right ureter. R = right. (b) Anteroposterior image obtained during barium enema examination performed the same day shows elevation of a redundant sigmoid colon on the left side (arrowhead). On the right side, the mass separates and lifts the cecum and distal ileum (solid arrow) and compresses the sigmoid colon (open arrow). (c) Transverse CT scan shows an extensive invasive mass (M).