PMC8330459_01
AP view plain radiograph reveals a markedly distended inverted U-shaped bowel loop sigmoid colon (coffee bean sign).
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Abdominal radiograph revealed a markedly distended inverted U-shaped bowel loop sigmoid colon or "coffee bean sign" (Figure 1).
Computed tomography with intravenous contrast reveals a dilated air-filled sigmoid colon with the "whirlpool sign" indicating the sigmoid volvulus.
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Computed tomography with 100 cc of Omnipaque 350 intravenous contrast revealed marked gas distention of the sigmoid colon and a "whirlpool sign" in the lower abdomen consistent with sigmoid volvulus (Figure 2).
Endoscopic view of sigmoid volvulus.
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After obtaining informed consent and induction of general anesthesia, an Olympus PCF-H190DL colonoscope was passed under direct visualization through the anus to the sigmoid colon where the colonic mucosa demonstrated a twisted appearance (Figure 3).