CT
Large right perinephric collection of fluid, gas locules and soft-tissue attenuation. Gas locules outline the posterior surface of the second part of the duodenum. There is a fluid filled track through the posterior duodenal wall.
Radiodense body posterior to the duodenal perforation.
Small right renal cyst, otherwise normal right nephrogram and symmetrical renal enhancement.
Inflammation extends into the right ascending mesocolon, the right paracolic gutter, abdominal wall and overlying subcutaneous fat.