MKI67 and invasive ductal breast carcinoma: The current analysis includes data from a previously published study (PBCS) where we reported an association with low grade but did not measure KI67.35 HT use is known to be more strongly associated with the invasive lobular cancers, typically low grade and low proliferating,45, 46 than with no‐special‐type (NST) invasive ductal carcinomas, which represent 50–70% of all invasive cancers.