Figure 4. Dilated colon simulates left adrenal tumour in a 65-year-old man with rectal carcinoma. (a) Axial multidetector CT (MDCT) shows low density mass (arrow) in a left suprarenal region suggesting adrenal tumour. Of note is low density liver metastases (arrowheads). (b) Axial MDCT obtained caudally to (a) demonstrates that the low density mass is a part of the dilated fluid-filled colon (arrow).