MKI67 and neuroblastoma: Hultmanet al. (2018) found that post DXR treatment the BE (2)-C (neuroblastoma cell line derived from human bone marrow) tumor growth presented a remarkable increase in Ki-67-index (from 43% to 64%; p<0.01), thus indicating a move towards cycling cells by application of DXR.Tredanet al. (2007) previously determined the same hypothesis and foundin vitro that quiescent (G0) tumor cells enter cell cycle after DXR treatment.