Abstract
Quantitative study of the Zn, Cu, K, Rb, Mn, Pb and Ni trace elements by the x-ray fluorescence method in normal and cancerous tissue samples, obtained from 18 patients suffering from cancer of the colon and rectum, shows that cancerous tissues exhibit statistically higher K, Rb, and Cu concentration than corresponding normal tissues. There are evidences that also Ni and Pb are elevated in cancerous tissues. Finally Zn and Mn do not show any appreciable difference in normal and cancerous tissues.
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