PLAUR and acute myeloid leukemia: A possible correlation between uPAR expression and the clinical features of acute leukaemias was previously observed in AML patients; a high uPAR expression, irrespective of the FAB category, showed a greater tendency to cutaneous and tissue infiltration, together with a higher leukocyte count, as compared to AML patients whose blasts were uPAR negative or dimly positive 21,22.