Gallbladder flap; Extrahepatic bile duct; Defect; Operation.
胆囊瓣；肝外胆管；缺损；手术。
Most often this is due to extrahepatic biliary tract obstruction.
这通常由肝外胆道阻塞所引起。
Patients had a mean number of 5.3 metastases (bilobar in 76%), associated to extrahepatic disease in 27%.
这些患者的平均转移瘤为5.3个（76%有分叶），27%患者合并肝外疾病。
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