Objective To detect and explore the expression of ARD1 and its clinical significance in the nasopharyngeal in-flammatory tissue ,nasopharyngeal carcinoma group and its subgroups .Methods Expression of ARD1 in nasopharyngeal carcinoma (56 cases) and nasopharyngeal inflammatory tissue (20 cases) were detected by immunohistochemical staining SP ,the correlation between the expression of ARD1 and age ,gender ,histological grade ,TNM clinical stage and tumor metastasis were analysed . Results The positive expression rate of ARD1 were 10 .00% (2/20) ,55 .35% (31/56) in the nasopharyngeal inflammatory tissue and nasopharyngeal carcinoma ,respectively .The expression level of ARD1 in nasopharyngeal carcinoma was significantly higher than in the nasopharyngeal inflammatory tissue ,the difference was significant (P< 0 .05) ;expression of ARD1 in the nasopharynge-al carcinoma was correlated with the histological grade of nasopharyngeal carcinoma(P< 0 .05) and the expression was increased in poor differenciation tissue .But there was no statistical difference between the expression of ARD1 and the patient′s age ,gender , TNM clinical stage ,tumor metastasis(P> 0 .05) .Conclusion The expression of ARD1 is high in nasopharyngeal carcinoma ,and has a closely correlation with diffferentiation level of tumor ,which suggested that ARD1 may be involved in the the occurrence and development of nasopharyngeal carcinoma .However ,further research needs to be done for its mechanism in the nasopharyngeal car-cinoma .%目的：检测 ARD1在鼻咽部炎性组织、鼻咽癌组织及其各亚组之间的表达情况并探讨其临床意义。方法应用免疫组织化学 SP 法检测鼻咽癌组织（56例）、鼻咽部炎性组织（20例）中 ARD1的表达情况，并分析 ARD1的表达与年龄、性别、分化程度、临床分期、肿瘤转移等临床参数的相关性。结果 ARD1在鼻咽部炎性组织、鼻咽癌组织中的阳性率分别为10．00％（2／20）、55．35％（31／56），ARD1在鼻咽癌组织中的表达水平明显高于其在鼻咽部炎性组织中的表达，差异有统计学意义（P＜0．05）；ARD1的表达与鼻咽癌组织的分化程度相关（P＜0．05），在分化差的组织中表达上调；但与患者年龄、性别、临床分期、肿瘤转移差异无统计学意义（P＞0．05）。结论 ARD1在鼻咽癌组织中高表达，且与肿瘤分化程度密切相关，提示 ARD1可能与鼻咽癌的发生发展有关，但具体如何发挥作用仍需做进一步的深入研究。
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