Conclusion The UECE is aseful to help find out patients without any clinical symptom.Therefore, this is important way for the health surveillance of workers exposed to benzidine.

• 结论通过尿脱落细胞检查可以检出尚无临床症状的早期患者，可使患者早期发现早期治疗膀胱肿瘤，所以尿脱落细胞学检查对于联苯胺作业人群的职业健康监护有著重要的意义。