Increase in Tγ Lymphocytes in B‐Cell Chronic Lymphocytic Leukaemia

Abstract
A significant increase in the proportion (mean 38% .+-. 9.3) and absolute number of T [thymus-derived] (suppressor) lymphocytes was observed in 13 patients with chronic lymphocytic leukemia (CLL) compared with 20 normal controls (mean 19% .+-. 6.5). Conversely, the proportion of T.mu. (helper) lymphocytes was lower in CLL (mean 27% .+-. 9.3) than in the controls (mean 40% .+-. 4), although the absolute numbers were normal or increased. An imbalance of T lymphocyte subsets controlling B [bone marrow-derived] lymphocyte differentiation may be relevant in the pathogenesis of CLL or some of its associated features.