PMC2823051_01
A. Barium enema showing the transverse colon and the duplicated segment. The duplicated segment is a tubular structure similar to the transverse colon in appearance and diameter. The lumen communicates with the transverse colon at both ends. B. Diagram illustrating the tubular duplication of the transverse colon. The duplicated segment (D) begins at the mid ascending colon and passes across the abdomen into the splenic flexure.
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F1
Barium enema revealed tubular duplication of the transverse colon (Fig. 1A). The duplicated segment originated from the lateral border of the mid ascending colon about 7 cm distal from the ileocecal valve and ended inferior aspects of the transverse colon just proximal to the splenic flexure, running parallel to the transverse colon and communicating at both ends (Fig. 1B).
A. Colonoscopic findings. Colonoscopy showing two lumens at the splenic flexure. The distal part of the duplicated segment ( ) communicates with the proper lumen and shows grossly normal colonic mucosa. B. Colonoscopic findings. The proximal opening to the duplicated segment on the mid ascending colon is shown. The colonoscope could not be passed through this opening.
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F2
Colonoscopy demonstrated a normal colonic mucosa in the duplicated segment (Fig. 2A). The colonoscope could not be passed through the proximal opening of the segment (Fig 2B).