They did not perform an analysis on hormone receptor–negative and ERBB2-low BC, a subgroup in which we found an association for TILs.36 It is known now after an extensive number of studies that TILs are associated with better survival in TNBC and to a lesser extent in ERBB2-positive BC, with fewer studies supporting the relevance of TILs in luminal (ie, hormone receptor–positive and ERBB2-negative) BC.5,6 The level of TILs in luminal-type BC is usually low. Here, ERBB2 is linked to breast cancer.