嗅神经母细胞瘤是一种少见的鼻腔恶性肿瘤,发生于70岁以上者罕见,本文报告2例如下。1资料与方法例1男,74岁。因左侧鼻腔反复出血伴头痛20余天,于2002年9月14日入院。患者自患病以来,左侧鼻腔反复出血,每次约50ml,色鲜红,左侧进行性鼻塞伴头晕、头痛、嗅觉减退。专科检查:鼻外观 Olfactory neuroblastoma is a rare nasal malignant tumor that occurs in persons over the age of 70 are rare, this report 2 cases as follows. 1 Materials and Methods Example 1 male, 74 years old. Repeated bleeding on the left nasal cavity with headache for more than 20 days, on September 14, 2002 admission. Since the onset of patients with the disease, the left nasal bleeding repeatedly, each about 50ml, bright red, left nasal congestion with headache, headache, decreased smell. Specialist examination: nose appearance