Abstract
The splenic red cell volume has been measured directly by an isotope method with quantitative scanning in 10 patients with leukaemic reticuloendotheliosis (hairy cell leukaemia). The volume ranged between 211 and 726 ml (mean 410 ml, SD 158) and this constituted 15--48% (mean 28.1%, SD 9.5) of the total circulating red cell volume. This is an exceptionally large pool when compared with that found in myeloproliferative and lymphoproliferative disorders with the same degree of splenomegaly. It is consistent with the histological features which show marked red cell accumulation in the splenic cord areas. The red cell pooling in the spleen thus appears to be a significant factor in the anaemia and there was fairly good correlation between the percentage of improvement in the anaemia and the percentage of red cell volume contained in the spleen. By direct measurement of the splenic red cell pool, it is possible to predict the extent to which splenectomy will benefit the anaemia and this may also provide an indirect measure of the extent of bone marrow dysfunction in the causation of the anaemia.
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