Local Immunoglobulin Production in Breast Cancer

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Abstract
Immunoglobulin levels (IgA, IgG, IgM) have been estimated in protein extracts of 55 malignant and 20 benign tumours of the breast, and in 17 normal tissues from a cancer bearing breast. IgA and IgG were significantly reduced in cancer compared with both benign and normal tissues but IgM, detected in only a third of tumours, was significantly increased. Total immunoglobulin levels and IgG in the malignant tumours correlated with plasma cell infiltration. The menstrual status of the patient had no influence on these findings.