ESR1 and neoplasm: The mean expression of ESR1 in tumours showing pCR after NAC was 34.13 ΔCt (IQR: 2.32 ΔCt, median: 34.36 ΔCt (min: 30.77 ΔCt, max: 40.01 ΔCt)), tumours without pCR had a mean expression of ESR1 of 33.81 ΔCt (IQR: 1.58 ΔCt, median: 34.44 ΔCt (min: 19 ΔCt, max: 37.05 ΔCt)).