There is a focal segment of sigmoid wall thickening characterising a solid enhancing mass that extends for 5.5 cm with a 4.0 cm width. This causes diffuse upstream colonic distension with faecal loading. A few adjacent lymph nodes are noted, measuring less than 1 cm in their short diameter. Small amount of free fluid in the pelvis. No free gas in the abdominal cavity. Small bowel is unremarkable. The liver demonstrates a subcapsular ill-defined hypodense nodule measuring 2.7 cm in the segment VI and a tiny 4.7 mm hypodense lesion in the segment IVB, which is too small to characterise. The gallbladder, pancreas, and adrenal glands are unremarkable. Kidneys have normal size and enhancement; there is a tiny non-obstructive calculus in the left kidney upper moiety. No hydronephrosis. Apart from a 1.5 cm right para-aortic lymph node, the retroperitoneum is unremarkable. No suspicious bone lesions. Pleural bases are clear. Conclusion: Features favouring a colonic carcinoma in the sigmoid causing at least partial obstruction and retained upstream faecal loading. Liver lesion in the segment VI is indeterminate within this protocol but may represent haemangioma, and multiphase CT is recommended to characterise.