Clinical presentation:
76 year old woman,diabetic, with recent diarrhoea.

The single-contrast barium enema shows occasional diverticula. There are large intraluminal defects, in or near the walls of the sigmoid colon and gas lucencies in and adjacent to the colonic wall.

The double-contrast view shows oval ring-shadows without any soft tissue density in the same juxta-mural location as the findings in the single contrast view.