Use of Radioactive Potassium (K42) in the Study of Benign and Malignant Breast Tumors

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Abstract
RADIOACTIVE phosphorus (P32) has been used for the study of human breast tumors by Low-Beer et al.,1 2 3 who first reported in 1946 that ulcerating carcinoma of the breast, counted externally in vivo after administration of radioactive phosphate intravenously, showed a significant increase in radioactivity when compared with the normal breast. Benign inflammatory lesions also caused a considerable increase in uptake of P32. Lesions deeper than 0.5 cm. from the surface and mucoid carcinomas at any depth produced no increase in counting rate. The method was therefore limited by a huge uptake of P32 in inflamed tissues and by . . .