Table 1.
Definition of surrogate subtypes of luminal IBC according to 13th St. Gallen International Breast Cancer Conference (2013) Expert Panel and 5th edition of the WHO Classification of Tumors (2019) [16, 17]
ER | PR | HER2 | Ki-67 | |
---|---|---|---|---|
Luminal A like | Positive | Positive | Negative | Low |
Luminal B like | ||||
HER2 negative | Positive | Negative or low and/or high Ki-67 | Negative | High and/or PR negative or low |
HER2 positive | Positive | Any | Overexpression and/or amplification | Any |