Abstract
Summary
Experiments reported in this paper suggest that extracts prepared from human cancer occasionally agglutinate, and frequently hemolyze red blood cells in vitro. These phenomena, but particularly the hemolysis, become evident only after a prolonged incubation of the tumor extracts with the red blood cells at 37°C. The agglutination is evident after 24 hours of incubation or earlier; the hemolysis requires 48 hours of incubation. Heating of the tumor extracts for 30 minutes to 56°C, prior to mixing tham with the red blood cells, destroys their ability to either agglutinate or hemolyze the erythrocytes.
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