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  • Title: Clinical significance of a long common channel.
    Author: Kamisawa T, Amemiya K, Tu Y, Egawa N, Sakaki N, Tsuruta K, Okamoto A, Munakata A.
    Journal: Pancreatology; 2002; 2(2):122-8. PubMed ID: 12123092.
    Abstract:
    BACKGROUND/AIM: It was reported that in only 19 (11%) of 173 patients was the common channel at the junction of the pancreatic and bile ducts found to be 6 mm or longer. Pancreaticobiliary maljunction (PBM) is defined as an anomaly with a markedly long common channel with the junction located outside the duodenal wall, so the action of the sphincter of Oddi does not functionally affect the junction. We defined high confluence of pancreaticobiliary ducts (HCPBD) as a length of the common channel > or = 6 mm, in which the communication between the pancreatic and bile ducts was occluded when the sphincter was contracted. This study aims at investigating the clinical significance of HCPBD. METHODS: 2,980 consecutive cases with an adequate endoscopic retrograde cholangiopancreatography were reviewed. PBM and HCPBD were diagnosed according to the above definitions. PBM was divided into two groups: with or without biliary dilatation. RESULTS: PBM and HCPBD were detected in 63 (2.1%) and 50 (1.7%) cases, respectively. Biliary dilatation was detected in 30 cases having PBM. The incidences of gallbladder carcinoma associated with PBM with or without biliary dilatation and HCPBD were 13, 67, and 12%, being significantly higher than in controls (p < 0.05, p < 0.01, and p < 0.05). Pancreatic ductal reflux was detected in 11 (85%) of 13 patients with HCPBD in whom postoperative T tube cholangiograms were performed, and acute pancreatitis occurred in 14 (24%) of the 50 patients with HCPBD. CONCLUSIONS: HCPBD may be an intermediate variant of PBM. It is necessary to pay attention to an associated gallbladder carcinoma in patients with HCPBD as well as in those with PBM.
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