NRP1 and acute lymphoblastic leukemia: Importance of Neuropilin-1, as marker of disease in pediatric acute lymphoblastic leukemia, is further stressed by Beesley et al 200526 who identified Neuropilin-1 as a part of gene expression signature associated with relapse and adverse clinical outcome, and by Solly et al. 201227 who considered Neuropilin-1 an useful marker of minimal residual disease.