Relapsed AML patients showed a positive and highly significant correlation between NRP-1 percentage expression and age (r= 0.986, p<0.001) and positive relationships between NRP-1 percentage and both BM blast % and CD14 (r= 0.882,0.899 respectively and p=0.02, 0.015 respectively). Here, NRP1 is linked to acute myeloid leukemia.