Fig. 35-3. Hystero-salpingograms, showing the uterus and uterine tubes. In A, note the cavity of the uterus, uterine tubes, and the bilateral "spill" of the radio-opaque medium into the peritoneal cavity, thereby demonstrating the patency of the tubes. B, View from in anterior and superior. Note the slit-like shape of the uterine cavity in this view. Note also the thickness of the uterine wall. (A, Courtesy of Sir Thomas Lodge. B, Courtesy of Robert A. Arens, M.D., Chicago, Illinois.) Click for high resolution image.