ERBB2 and CDH1-related diffuse gastric and lobular breast cancer syndrome: The majority had nodal involvement (60.4%, n = 61) and 99.0% patients had grade 2/3 disease (n = 100), Overall, 46.5% had luminal (LBC, n = 47), 17.8% had luminal B-HER2 + (LBBC-HER2 + , n = 18), 15.8% (HER2 + , n = 16), and 18.8% had triple negative (TNBC, n = 19).