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Coffee bean sign

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(Redirected from Kidney bean sign)

The kidney bean sign (more commonly called the coffee bean sign; also bent inner tube sign) is a radiologic sign observed on abdominal radiographs that indicates the presence of a sigmoid volvulus, a form of bowel obstruction. It is seen as an area of hyperlucency resembling a coffee bean. 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. Air-fluid levels may also be seen in the segments of dilated bowel.

References

  1. ^ Feldman, Deborah (2000). "The Coffee Bean Sign". Radiology. 216 (1): 178–179. doi:10.1148/radiology.216.1.r00jl17178. ISSN 0033-8419. PMID 10887245.
  2. Stavride, Eliza; Plakias, Charalampos (2020). "Coffee bean sign: Its meaning and importance". Clinical Case Reports. 8 (10): 2086–2087. doi:10.1002/ccr3.3064. ISSN 2050-0904. PMC 7562879. PMID 33088563.
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