Background/aims: Juxtapapillary diverticula (JPD) are considered to be associated with choledocholithiasis but not with cholecystolithiasis. However, there have been few comparative studies on the relationship between JPD and cholecystolithiasis under strict matching for sex and age.
Methodology: Among 4542 consecutive ERCPs at Tokyo Metropolitan Komagome Hospital, 549 patients who were 63 years of age or older were enrolled in this study and were matched for sex and age. They were divided into two groups: with and without JPD. Firstly, the frequency of cholecystolithiasis was compared between the two groups. Next, we recruited 83 patients whose JPD size could be measured by the ERCP films and investigated the relationship between JPD size and gallstones.
Results: We found no correlation between JPD and the overall frequency of cholecystolithiasis. However, an analysis of 83 patients with measurable JPD revealed that the size of JPD was closely linked to the occurrence of cholecystolithiasis. The JPD size was statistically larger in patients with cholecystolithiasis than those without. Moreover, when the mean diameter of JPD was 20 mm or more, the incidence of cholecystolithiasis rose up to 73.3%, which was significantly greater compared to the incidence in patients without JPD (p< 0.05).
Conclusion: A larger JPD may play a role in the formation of gallbladder stones.
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