Abstract
In the preceding paper (Lockner 1966 b) a new method for the quantitative estimation of erythropoiesis is introduced. This method is based on the principle that the fraction of plasma iron transported per day (PIT) and incorporated into the circulating erythrocytes (RBCIT) becomes a quantitative measure of erythropoiesis, if recircula-tion of radioiron can be inhibited. This was achieved by intravenous injections of inactive iron. It is the purpose of this paper to report the application of this method to cancer patients. A preliminary account of this work has been presented (Lockner 1964).