Radiographic and ultrasonographic findings in a dog with emphysematous pyometra

Left lateral (a) and ventrodorsal (b) abdominal radiographs. The mainly gas-filled and partly fluid-filled tubular structure (white asterisks) is seen dorsally (a) and medially (b) to the descending colon (black asterisk), extending to the right craniodorsal abdomen. The uterine body is faintly seen summating over the craniodorsal aspect of the urinary bladder (a double-headed arrow) but the uterine horns cannot be followed. The letter L in b indicates the left side of the do