A New Quantitative Classification of the Extrahepatic Biliary Tract Related to Cystic Duct Implantation

作者：Matteo Renzulli, Stefano Brocchi, Giovanni Marasco, Daniele Spinelli, Caterina Balacchi, Massimo Barakat, Irene Pettinari, Rita Golfieri · 发表于：Journal of Gastrointestinal Surgery · 年份：2020 · DOI：10.1007/s11605-020-04852-8 · 被引用次数：11 · 研究领域：Gallbladder and Bile Duct Disorders、Pediatric Hepatobiliary Diseases and Treatments、Pancreatitis Pathology and Treatment

BACKGROUND: Knowledge regarding biliary anatomy and its variations, including the cystic duct (CD), is important in the pre-surgical setting and for predicting biliary diseases. However, no large series has focused on CD evaluation using a quantitative analysis. The primary aim of this prospective study was to create a 'taxonomic' classification of CD anatomy in a large cohort of subjects who underwent magnetic resonance cholangiopancreatography (MRCP). The secondary aim was to evaluate the correlations between extrahepatic bile duct (EHBD) variants and biliary diseases. METHODS: We enrolled patients who underwent MRCP for different clinical indications from January 2017 to May 2019. Demographical, anatomical and clinical data were evaluated using statistical analyses, as appropriate. The anatomical assessment of EHBD was performed using the standard classification for CD in low, medium, and high insertions, and the lengths of CD to the duodenal papilla (DP), and EHBD was determined to conduct a new quantitative analysis. RESULTS: The final study population comprised 1004 subjects. A new classification for EHBD as per the percentile distribution of the ratio CDDP/EHBD was designed, and the following categories were obtained: type 1 (below the 25th percentile) for CDDP/EHBD ratio ≤ 50%; type 2 (25th to 75th percentile) for CDDP/EHBD ratio 51-75% and type 3 (above the 75th percentiles) for CDDP/EHBD ratio > 75%. Type 1 of the new classification of CD implantation was significan...