目的:探讨鼻腔恶性肿瘤的CT表现及误诊原因,为临床诊断提供帮助。方法:回顾性分析经手术病理证实的25例鼻腔恶性肿瘤的CT影像资料,探讨其CT表现及误诊原因。结果: 25例中鼻腔鳞状细胞癌8例,腺癌2例,腺样囊性癌3例,内翻性乳头状瘤恶变3例,非霍奇金淋巴瘤5例,浆细胞瘤1例,黑色素瘤3例。CT扫描10例表现为形态规则, 内部密度均匀,15例表现为形态不规则、内部密度不均匀,1例有钙化,3例中心伴有有坏死/囊变；20例发生于单侧鼻腔,5例发生于双侧鼻腔,3例伴有颈部淋巴结肿大。结论:鼻腔恶性肿瘤CT表现复杂,缺乏特异性,CT增强扫描有助于提高疾病的诊断。

Objective:Analysis the CT features of nasal cavity diseases and analyze the causes of misdiagnosis,provide help for clinical diagnosis.Methods:CT findings of 25 cases with surgically and pathologically proved nasal cavity tumors were analyze retrospectively,and the causes of misdiagnosis were evaluated.Result:Among all 25 cases,8 cases were squamous cell carcinoma ,and the other 2 cases were adeno carcinoma,and the other 3cases were adenoid cystic carcinoma,and the other 3 cases were malignant transformation of inverted papilloma,and the other 5cases were non hodgkin^,s lymphoma,and the other 1cases were plasmacytoma,and the other 3cases were melanoma.The imaging characteristics of 10 case was regular shaped with sharpness of border,the internal density in uniform,and the other 15cases appearing as amass with obscure border,the internal density in not uniform,and the other 1cases it contains calcification,and the other 3cases necrosis and cystic change occurred;Among them,20 cases located in the unilateral nasal cavity,and 5 cases located in the bilateral nasal cavity ,and 3 cases were found having enlarged lymph nodes.Conclusion:The imaging of sinonasal malignant tumors is complicated and lacks specificity.,enhanced CT be conducive resulting in improvement of the diagnostic accuracy of the disease.