Hematology

THIS report covers recent progress in the investigation and treatment of the anemias and the hemorrhagic diseases.AnemiasAs in previous progress reports, the anemias are classified primarily on etiologic grounds. Such a classification is simple and easily remembered and may be said to be based on economic principles: the bone-marrow "factory" requires materials for the production of its most important finished product, the red cell. Anemia results when the materials necessary for supplying the bone-marrow factories are inadequate, the factories themselves are inadequate or there is an excessive loss either by hemorrhage or by increased breakdown of the finished . . .