Fig. 1From: Collagenous colitis presenting as spontaneous perforation in an 80 year old woman: Report of a CaseRadiologic images: a Axial view of unenhanced abdominal CT showing thickened bowel wall with fat stranding (thin arrow) involving the colonic splenic flexure. b and c Zoomed axial view of the left abdomen in soft tissue (b) and pulmonary (c) windows showing pneumatosis (thick arrow) and free air in the surrounding mesocolon (star)Back to article page