方法：以鼠抗人CD1a单克隆抗体为一抗，采用免疫组化SP染色法检测31例Rb组织中树突状细胞的表达。

结果：在所有31例标本中，有23例经免疫组化染色后有CD1a⁺细胞的表达，即阳性率为74.2%。其中高分化为主型阳性率为77.8%(7/9)，未分化为主型阳性率为75%(15/20)，自发退变型为50%(1/2)。

结论： Rb组织中CD1a阳性细胞数量与肿瘤分型之间未见明显相关性，TIDC是否可看作一个良好的肿瘤预后指标，还有待进一步确证。

METHODS: The expression of tumor-infiltrating dendritic cells was examined by immunohistochemical staining(S-P method), using CD1a mouse monoclonal antibody in Rb tissues of 31 cases.

RESULTS:The expression of CD1a⁺ cells was found in tumor samples of 23 cases(74.2%)among the total 31 cases. The rates of positive CD1a expression in well-differentiated type was 77.8%(7/9)and in undifferentiated type cancer tissues was 75%(15/20), respectively(P>0.05). The rate of spontaneous regression type was 50%(1/2).

CONCLUSION: There was no correlation between the number of CD1a⁺ cells and tumor grade in Rb. It is difficult to identify whether TIDC was good indicator in assessing tumor prognosis.