Phenotype and cell cycle distribution in peripheral blood and bone mar
row mononucleated cells was studied in patients with different leukemi
as: T-ALL, AML, CLL, CML and plasmocytoma. DNA flow cytometry with pro
pidium iodide fluorescence was used. Differences in cell cycle between
mononucleated cells from T-ALL and CML patients on one hand and norma
l controls on the other were seen in peripheral blood but not in bone
marrow specimens. Patients with AML, CLL and plasmocytoma showed a cel
l cycle distribution of mononucleated cells similar to normal controls
. DNA content analysis in some leukemias was discussed.