ABCB1 upregulation was observed in OC tumor tissue15 and ABCB1 level associated with higher risk of progression of the disease and also with poor response to the treatment,16, 19, 21 but not with OS.16 The above published data support the connection of ABCB1 upregulation with poor TTP and chemotherapy resistance in the present study. The gene discussed is ABCB1; the disease is neoplasm.