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  • Title: Biliary carcinoma risk in patients with pancreaticobiliary maljunction and the degree of extrahepatic bile duct dilatation.
    Author: Kamisawa T, Tu Y, Kuwata G, Egawa N, Nakajima H, Tsuruta K, Okamoto A, Matsukawa M.
    Journal: Hepatogastroenterology; 2006; 53(72):816-8. PubMed ID: 17153430.
    Abstract:
    BACKGROUND/AIMS: Pancreaticobiliary maljunction (PBM) carries a high risk of biliary carcinoma. This study aimed to examine the biliary complications of patients with PBM in relation to the degree of extra-hepatic bile duct dilatation. METHODOLOGY: Ninety-eight cases of PBM could be divided into 5 groups according to the maximum diameter of the extrahepatic bile duct: < or = 10mm, 11-15mm, 16-20mm, 21-30mm, > or = 31mm. The clinicopathological findings of biliary carcinomas associated with PBM were compared with 232 cases of gallbladder carcinoma and 159 cases of bile duct carcinoma that were not associated with PBM. RESULTS: Gallbladder carcinoma occurred in 36 of 65 patients (55%) with PBM whose maximum diameter of the extrahepatic bile duct was < or = 30mm, but no gallbladder carcinoma occurred in patients with PBM whose diameter was > or = 31mm. Bile duct carcinoma occurred in 6 of 52 patients (12%) with PBM whose diameter was > or = 21mm, but no bile duct carcinoma occurred in patients with PBM whose diameter was < or = 20mm. The age at diagnosis of the patients with gallbladder or bile duct carcinoma associated with PBM was significantly younger than those without PBM (p<0.01). CONCLUSIONS: PBM with an extrahepatic bile duct diameter < or = 30mm is associated with a high risk of gallbladder carcinoma. PBM with an extrahepatic bile duct diameter > or = 21mm is associated with a high risk of bile duct carcinoma. Prophylactic cholecystectomy is recommended for patients with PBM without biliary dilatation.
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