作者用免疫组化法检查了11个根尖肉芽肿和7个根尖囊肿内的免疫活性细胞,着重探讨了T 细胞的功能亚群及其和免疫球蛋白产生细胞间的关系。结果如下:1.两种病变中,免疫活性细胞(T 亚类、单核白细胞或巨噬细胞和免疫球蛋白细胞)的比例未见显著差异;2.病变的单个核浸润细胞中,约半数是免疫球蛋白细胞,其中,IgG、IgA 和IgM 细胞相应为85%,10%和1～2%,1/3是T 细胞,CD_4~+:CD_3~+=2:1;单核白 The authors used immunohistochemical methods to examine the immunocompetent cells in 11 apical granuloma and 7 root cysts, focusing on the functional subpopulations of T cells and their relationship with immunoglobulin-producing cells. The results were as follows:1. There was no significant difference in the percentage of immunocompetent cells (T subtypes, mononuclear leukocytes or macrophages and immunoglobulin cells) between the two lesions; 2. About half of the mononuclear infiltrating cells of the lesions. It is an immunoglobulin cell, in which IgG, IgA and IgM cells are correspondingly 85%, 10% and 1-2%, 1/3 is T cell, CD_4~+:CD_3~+=2:1, mononuclear white