Abstract

This paper discusses the use made of the antigenic specificity of malignant tumours in the diagnosis and subsequent management of a patient with secondary malignant disease who had previously been treated for both carcinoma of the breast and malignant melanoma. A comparatively simple, rapid test (leucocyte adherence inhibition) was used to determine the patient's antitumour immunoreactivity. Cell-mediated immunity against both types of tumour was detected, but this was accompanied by serum-blocking factor corresponding to melanoma only, which indicated that the secondary malignant disease was melanoma.

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