Coffee bean sign

Coffee Bean Sign is a radiological sign that is often associated with sigmoid volvulus, a condition where the sigmoid colon twists on its mesentery, leading to obstruction and possible ischemia. The sign is named due to the resemblance of the dilated sigmoid colon to a coffee bean on an abdominal radiograph.

Overview

The Coffee Bean Sign is a diagnostic feature that is typically seen in radiology. It is a characteristic sign of sigmoid volvulus, a condition that is common in elderly patients and those with chronic constipation or a history of abdominal surgery. The sign is so named because the appearance of the dilated sigmoid colon on an abdominal radiograph resembles a coffee bean.

Clinical Significance

The Coffee Bean Sign is significant because it aids in the diagnosis of sigmoid volvulus, a potentially life-threatening condition if not promptly treated. The sign is indicative of a large bowel obstruction, which can lead to ischemia, necrosis, and perforation if left untreated.

Diagnosis

The Coffee Bean Sign is typically identified through an abdominal radiograph, although it can also be seen on a computed tomography (CT) scan. The sign is characterized by a dilated loop of the sigmoid colon, which appears similar to a coffee bean. The "bean" is typically oriented with the convexity to the right, the "inner" curve of the bean pointing towards the pelvis, and the "outer" curve pointing towards the diaphragm.

Treatment

Once the Coffee Bean Sign has been identified, treatment for sigmoid volvulus typically involves detorsion of the twisted sigmoid colon, often achieved through a sigmoidoscopy. In severe cases, surgery may be required.

See Also

• Radiology
• Sigmoid volvulus
• Abdominal radiograph
• Computed tomography

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