Based on this, we found that the overall positive rate of NRP‐1/CD304 in all specimens was 14.81% (44/297), and the positive rate of NRP‐1/CD304 in descending order was as follows: BPDCN (6/6, 100%), B‐ALL (48.61%, 35/72), AML (3/67, 4.48%), which were similar to those reported in other studies.22, 27, 29, 31. Here, NRP1 is linked to acute lymphoblastic leukemia.