Rademakers et al who also used DIA on whole tumour section slides do not explicitly state they adjusted scoring for non‐neoplastic regions; which could have led to a lower ratio of Ki‐67 positive cells.13 Also, intratumour heterogeneity may lead to lower Ki‐67 PI if the incorrect region within the tumour is counted. The gene discussed is MKI67; the disease is neoplasm.