Abstract
A 52-year-old male participating in a colorectal cancer screening programme and testing positive for faecal occult blood underwent a colonoscopy to the caecum, which detected multiple polypoid nodulations in the right colon wall, most of them confluent. The mucosa was conserved. A single biopsy was performed, which revealed injury collapse. Suspected with microperforation, the patient had a simple abdominal X-ray and a CT colonography to complete the study. The CT colonography (Figs. 1A: coronal plane, and 1B: axial plane; arrows) showed numerous air-containing cyst formations dependent on the ascending colon wall and proximal portion of the transverse colon. The 3D-type reconstruction of endoscopic images (Figs. 2A and 2B) showed injuries superimposable to those visible on optical colonoscopy (Figs. 2C and 2D). The findings were compatible with cystic pneumatosis of the colon.
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