Chromosomal breaks in T and B lymphocytes in Fanconi's anemia

Three patients with Fanconi's anemia were analyzed for chromosome breaks. T and B cells were separated and grown in tissue culture with PHA and pokeweed antigen to ascertain the rates of breakage in these lymphocytic subpopulations. It has been found that there is no statistically significant difference in breakage rates in T and B lymphocytes. It is postulated that both T and B cells could be involved in the development of leukemia in Fanconi's anemia patients, assuming that chromosome breaks constitute a factor predisposing to the development of malignancy.