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bile diverticulum
正常位于胆囊粘膜上小指样大小的凹陷,随年龄增长而逐渐加深,可深入肌层或浆膜层呈囊状.胆囊造影显示锯齿状甚至局部出现大突起等改变,常与慢性胆囊炎和伴随的胆囊内压升高有关.如发生急性或慢性胆囊炎即可行胆囊切除术.