恶梗阻性病变区的形态一般难以在经皮肝穿刺胆管造影(PTC)中显示,而“软藤征”对胆管梗阻性病变的定性诊断有着重要的意义;“枯树枝征”对良性病变的诊断亦有很大的提示价值。经肝内胆管组织切片研究证实,“软藤征”的病理基础是胆管腔扩大,胆管壁变薄;“枯树枝征”的病理基础是胆管壁增厚,小胆管腔变形、变小,甚至闭锁。 The morphology of malignant obstructive lesions is generally difficult to display in percutaneous transhepatic cholangiopancreatography (PTC), and “soft rattan sign” has important implications for the qualitative diagnosis of bile duct obstructive lesions; “birth branch sign” is a benign lesion. The diagnosis also has great prompting value. The study of intrahepatic bile duct tissue section confirmed that the pathological basis of “soft rattan sign” is enlargement of bile duct and thinning of bile duct wall; the pathological basis of “dry bunting sign” is thickening of bile duct wall, deformation of small bile duct lumen, reduction in size, or even atresia.