男,51岁,1年前自觉嗅觉减退并偶尔有脑脊液自鼻腔滴出,近5d出现头痛伴鼻腔流血,偶有恶心,无抽搐。鼻腔未见异常分泌物,鼻部嗅觉进行性减退。磁共振检查见双侧鼻窦及额部大块状不规则肿块,T1WI呈等低信号,T2WI呈混杂高信号。肿块向下凸入双侧蝶窦及部分进入双侧海绵窦,向上凸入 Male, 51 years old, a year ago, a sense of smell diminished and occasional cerebrospinal fluid dripping from the nose, headache with nasal bleeding nearly 5d, occasionally nausea, no convulsions. No abnormal nasal secretions, nasal olfactory progressive decline. Magnetic resonance imaging showed massive bilateral irregular sinus and forehead mass, T1WI showed low signal, T2WI was mixed high signal. Mass downward convex into the bilateral sphenoid sinus and part into the bilateral cavernous sinus, upward convex