CCNB1IP1 and neuroblastoma: High expression of CCNB1IP1(IHC score defined as moderate and strong) was observed in approximately 78.4% of MYCN‐AM NB patients, whereas low expression of CCNB1IP1 (IHC score defined as low and negative) was detected in about 75.0% of MYCN‐NA NB patients (Figure 2C).