Can the location of the CT whirl sign assist in differentiating sigmoid from XXXX ?

@entity1 @entity1290 @entity694 @entity3313
AIM: To determine whether the location of the computed tomography (CT) whirl sign can be used to help differentiate caecal from sigmoid @entity3313 . MATERIALS AND METHODS: Thirty-one @entity1 (mean age 64.6 years) underwent multidetector CT and had confirmed @entity694 . There were 15 @entity1 with @entity3313 . Axial and coronal images were retrospectively evaluated on the picture archiving and communication system (PACS) by two reviewers in consensus without knowledge of the final diagnosis to determine whether a CT whirl sign was present and, if so, was the location to the right of midline or in the midline/left. The location of the twisting at imaging was correlated with whether the @entity1 had @entity3313 . Fisher's exact test was used to determine whether there was an association between the location of the twist (right versus mid-left) and the location of the @entity694 (caecal versus sigmoid). The non contrast CT (NCCT) examinations of 30 additional @entity1 without @entity694 were evaluated for the presence or absence of a CT whirl sign. RESULTS: All 31 @entity1 with @entity694 had a CT whirl sign. No @entity1 who underwent NCCT for @entity1290 demonstrated a CT whirl sign. According to Fisher's exact test, there was a highly significant association (p<0.0001) between the location of the twist (right versus mid-left) and the location of the @entity694 (caecal versus sigmoid). Using the location of the twist as a predictor of whether the @entity3313 was caecal or sigmoid provided a correct diagnosis for 93.3% (14/15) of the @entity1 with @entity3313 and 100% (16/16) of those with sigmoid @entity3313 , yielding an overall diagnostic accuracy of 96.8% (30/31). CONCLUSION: The location of the mesenteric twist (CT whirl sign) is a highly accurate finding in discriminating caecal from sigmoid @entity3313 .
