Immunohistochemical analysis of lymphocytic infiltration in the tumor microenvironment in patients operated on for laryngeal cancer

The aim of this study was to evaluate semiquantitative and qualitative analysis of lymphocytic infiltrations in a neoplasm microenvironment in patients with laryngeal cancers and the correlation analysis between the intensitivity degree and composition of lymphocytic infiltration in foreseeing a survival time and probability of the appearance of lymph node metastases. Postoperative specimens from 43 patients (Upper Silesia region) operated on for laryngeal cancer in the 2nd ENT Department, Silesian Medical University in Zabrze between 1985 and 1995 all had unfavorable courses due to tumor recurrences. The patients' ages ranged from 39 to 79 years (mean 57 years). Tissue specimens were subjected to routine processing. The degree of pathological changes was ascertained and immunohistochemical preparations of laryngeal tissue were prepared according to generally accepted methods. The following primary monoclonal antibodies were used: CD 3, CD 20, CD 43, CD 45 RO, CD 56. The distribution analysis of the intensity of the phenotype CD 43 evaluated the lymphocytic infiltration in relation to differentiation of the whole study group. The intensity of CD 43 cell infiltration increased in the group of patients with lymph node metastases. In patients with stage IV disease, a relationship was found between survival time and intensity of-cell infiltrations with CD 43 and CD 45 RO lymphocytes. The influence of these two lymphocyte phenotypes in the patient subgroups - one after total laryngectomy with confirmed lymph node metastases and the other group without lymph node metastases showed their prognostic value. Our analysis of lymphocytic infiltration, mostly of CD 43 cells, in the neoplasm microenvironment indicated a prognostic value for determining a shorter survival time and the possibility of lymph node metastases in patients with recurrences of cancer.