Because different types of CCFs hae different hemodynamic alteration and different draining routes, clinical features such as pulsating exophthalmos may not come out.

• 由于不同类型的CCF，有不同的血流动力学改变和不同的引流路径，临床特点可没有搏动性眼球突出。在这些情况下，容易漏诊6-8。