ERBB2 and breast cancer: At a median follow-up of 4.3 years, they reported on 1994 mastectomised breast cancer patients, treated without adjuvant RT between 1998 and 2009, LRR rates of 1.8%, 3.1%, 1.7%, 1.9% and 1.9% in luminal A, luminal B, Her2 (+) luminal, Her2 (+) non-luminal and TNBC breast cancer patients, respectively.