Abstract
Background: Regardless of the etiology of biliary diseases, intrahepatic or extrahepatic biliary dilatation is usually observed as a result. To investigate the possible reasons, primarily, we have to determine the dilatation. At this point, the most important question is what is the limit of a normal common bile duct (CBD) size and does it really differ after cholecystectomy? The size of normal CBD has been measured and reported in previous studies by various imaging methods but to our knowledge, it has not been measured by MRI cholangiography before. The aim of this study was, therefore, to determinate the normal diameter of CBD and to compare with post-cholecystectomy patients by MRI cholangiography. Findings: MRI data was acquired for a six month period retrospectively. A total of 104 patients who had undergone MRI cholangiography due to any reason were divided into two groups: with cholecystectomy (31 patients) and without cholecystectomy (73 patients). The mean diameter of normal CBD in those without and with cholecystectomy patients was 4.28 mm and 7.92 mm respectively. Mean of CBD diameters of post-cholecystectomy patients was significantly greater than the control group (p<0.001). Conclusion: In conclusion, the mean diameter of normal CBD shows a significant increase in cholecystectomized patients.
Published Version
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