PMC9938343_01
Upright chest x-ray suggesting dilated distal colon without pneumoperitoneum
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FIG1
X-ray showed dilated large bowel with a sign of sigmoid volvulus (Figures 1, 2).
Plain x-ray abdomen suggesting dilated colon without small bowel dilation
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FIG2
X-ray showed dilated large bowel with a sign of sigmoid volvulus (Figures 1, 2).
CT abdomen with IV and rectal contrast showing omega sign, suggesting sigmoid volvulus
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FIG3
CT with IV and rectal contrast (Figure 3) showed dilated transverse colon with pneumoperitoneum.