目的　研究嗅神经母细胞瘤的CT、MRI表现。方法　本组经病理证实 9例 ,男 4例 ,女 5例 ,平均年龄 3 4.6岁。CT平扫检查 4例 ;MRI 7例 ,MRI强化 2例。结果　发生于鼻腔 2例 ,鼻筛窦区 7例 ,右侧 6例 ,左侧 3例。CT、MRI表现为破坏性实体性占位 ,CT值 2 9～ 3 6HU ;MRIT1WI高于舌肌均匀信号强度 ,T2 WI稍高于脑灰质信号强度。 9例均有鼻甲、筛窦骨破坏 ,4例侵犯对侧鼻或筛窦 ,侵入颅内 8例 ,额窦 6例 ,同侧眶内 8例 ,2例突眼 ,破坏上颌窦 5例 ,蝶窦 5例。结论　发生于鼻腔、筛窦的破坏性实体肿瘤 ,MRIT2 WI中等均匀信号强度者应诊断本病 Objective To study CT and MRI findings of olfactory neuroblastoma. Methods The group confirmed by pathology in 9 cases, 4 males and 5 females, with an average age of 3 4.6 years old. CT plain scan in 4 cases; MRI in 7 cases, MRI enhanced in 2 cases. The results occurred in 2 cases of nasal cavity, nasal ethmoid sinus area in 7 cases, 6 cases on the right and 3 cases on the left. CT, MRI showed destructive substantive occupying CT value of 29 ~ 3 6HU; MRIT1WI higher than the average signal intensity of the tongue muscle, T2 WI slightly higher than the gray matter signal intensity. 9 cases had turbinate, ethmoid bone destruction, 4 cases of violations of contralateral nasal or ethmoid sinus invasion in 8 cases, frontal sinus in 6 cases, ipsilateral orbital in 8 cases, 2 cases of exophthalmos, 5 cases of maxillary sinus destruction, Sphenoid sinus in 5 cases. Conclusion The nasal cavity, ethmoid sinus destructive solid tumors, MRIT2 WI average signal intensity should be diagnosed with this disease