Fig. 3

Palliation of unresectable CRC and dedicated CT reconstruction techniques. In an elderly male, sagittal contrast-enhanced CT (a) shows a 6-cm-long segment with enhancing, non-stratified increased mural thickness (arrowhead) at the rectosigmoid junction, causing luminal stricture and upstream large bowel obstruction (LBO*) complicated by fistulisation (thin arrow) to the prostate and urinary bladder. After endoscopic stenting, repeated CT (b, c) including focused oblique images (note obliquity in c insets) effectively depicted the correct position of the SEMS (thick arrows) at the site of CRC (arrowheads), filled with faecal fluid with partial persistence of upstream colonic dilatation (*). Additional thick-slab (d) and maximum-intensity projection (MIP) reconstructions depict the tubular shape and reticular “mesh” structure of the well-expanded SEMS (e)