Cesarean section scar. Spot radiograph shows the uterine incision from a cesarean section (arrows) in the typical location (ie, oriented transverse in the lower uterine segment in the region of the isthmus). At HSG, a cesarean section scar can have a linear appearance (as in this case) or can occasionally manifest as a wedge-shaped outpouching or diverticulum.



http://radiographics.rsna.org/content/26/2/419.figures-only