The clinical situation including angina capitis (85%), acuity of vision changing (35%), cranial never paralysis (25%), backsiphon haemorrhagia nasalis (30%).

• 临床表现有头痛(85%25)、视力改变(35%25)、颅神经麻痹(25%25)、回吸性涕血或鼻出血(30%25)。