12 year old Labrador Retriever

Findings

There is a large, lobular, soft tissue opacity mass in the caudal retroperitoneal space. The colon is displaced ventrally, and is distended with fecal material. The bladder is enlarged and cranially displaced. The peritoneal detail is good. The liver, spleen, and kidneys are normal in size and shape. No abnormalities are noted in the stomach or small intestine. There is spondylosis deformans at the lumbosacral space.