MYCN and neuroblastoma: Our results here expand these findings to a group of 54 stage 3 neuroblastomas, and show that 68% (mean) of microvessels in the aggressive stage 3 tumors (MYCN amplified/unfavorable histology) expressed integrin αvβ3 compared to only 34% (mean) in the non-MYCN amplified/favorable histology ones.