Coffee bean sign
 | This article relies largely or entirely on a single source. (December 2024) |
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[1]. 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.<ref>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.</ref Air-fluid levels may also be seen in the segments of dilated bowel.[1]
References
[edit]- ^ a b Feldman, Deborah (2000). "The Coffee Bean Sign". Radiology. 216 (1): 178–179. doi:10.1148/radiology.216.1.r00jl17178. ISSN 0033-8419. PMID 10887245.