Coffee Bean Sign
The coffee bean sign (also called the kidney bean sign, or bent inner tube sign) is a radiologic sign observed on Abdominal x-ray, abdominal radiographs that specified the presence of a Sigmoid colon volvulus, sigmoid volvulus, a form of bowel obstruction. It can be identified on both abdominal x-rays and abdominal CT scan, computed tomography scans. It is seen as an area of hyperlucency resembling a coffee bean and represents the torsion of the sigmoid colon around the mesentery. The opposed walls of adjacent bowel loops form the central cleft while the two sides of the bean represent gas‐filled segments of dilated bowel that form an inverted U‐shape. Physicians must be aware of this sign as it indicates the possible need for emergent medical intervention as sigmoid volvulus can be a life-threatening condition. Methods of detection Up to 80% of cases of sigmoid volvulus can be identified through plain abdominal radiographs of patients taken in the supine position. The pat ...
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