Summary
Characterization of T-lymphocyte subpopulations adjacent to and infiltrating the primary tumor of breast cancer was carried out using a direct immunofluorescence procedure with the antibodies anti-(Leu-2a) for suppressor/cytotoxic (CD8+) and anti-(Leu-3a) for helper/inducer (CD4+) T-lymphocytes. Fifty-six primary malignant tumors with lymphoid infiltration were studied. The majority (58.9%) were infiltrating duct carcinoma. There were metastases to axillary lymph nodes in 6.67% of the patients. Massive lymphoid infiltration (>40 lymphocytes per ×400 microscopic field) was found in 19.6% of the tumors and moderate infiltration (20–40 lymphocytes per field) in 51.8%. In all the tumors studied there was a reversed CD4+/CD8+ ratio as compared to that found in normal peripheral blood. In 66.1% the CD4+/CD8+ ratio (helper/suppressor) was less than 1.0. The reversed ratio was due to a significant decrease in the number of helper cells (P<0.0005). The most significant drop was in the stroma area (P<0.0001) as well as in the tumor tissue (P=0.001). Of particular interest was the significant positive correlation between the age of the patients and an increased number of CD4+lymphocytes in the stroma (P=0.02). Significant negative correlations were found between a reduced number of CD4+ lymphocytes or CD4+/CD8+ ratio and several histological parameters: tumor diameter, pleomorphism, nucleus/cytoplasm ratio. There was also a significant positive correlation between the total number of CD8+ lymphocytes infiltrating the tumor tissue and the number of axillary lymph nodes with metastatic disease (P=0.03). It is suggested that the reversed ratio of CD4+/CD8+ lymphocytes may significantly affect the host/tumor immune surveillance.
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Bilik, R., Mor, C., Hazaz, B. et al. Characterization of T-lymphocyte subpopulations infiltrating primary breast cancer. Cancer Immunol Immunother 28, 143–147 (1989). https://doi.org/10.1007/BF00199115
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DOI: https://doi.org/10.1007/BF00199115