Thrombocythemia

Abstract

IN the past study of the myeloproliferative disorders of the bone marrow has been devoted to the red-cell and white-cell series. To be sure, some attention has been paid to the relation of the megakaryocytes to thrombocytopenia, but, strangely enough, there have been few observations of excessively high platelet counts and megakaryocytic hyperplasia. Tocantins¹ has described moderate increases in the platelet count from various stimuli — for example, fractures, operations, hypochromic anemia and dermatoses. This increase is called thrombocytosis and is probably not uncommon. Little is known about the histology of the bone marrow in such conditions.In contrast there . . .