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Large low attenuating (18HU), cystic appearing mass in the lower abdomen extending into the pelvis ?compressing the urinary bladder
No abnormality in the retroperitoneum. Ureters difficult to trace to exclude tied of ureters but unlikely as there is no hydroureter/hydronephrosis.
Dilated small bowel loops, no obvious transition zone visible, likely in proximal ileal loops.