Q: What is "Bent Inner Tube" sign?
Answer: pathognomonic sign of sigmoid volvulus
Sigmoid volvulus may presents as a U-shaped, distended sigmoid colon, which may appear as an ahaustral collection of gas extending from the pelvis to the right upper quadrant up to the diaphragm. This is highly suggestive but not a confirmatory sign. CT scan should be performed. This can also be present in other causes of distal colonic obstruction, colonic pseudo-obstruction, and toxic megacolon. It is also referred to as coffee bean, kidney bean or omega sign.
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