Among the patients with gBRCAm, TNBC subtype was associated with poorer OS compared to patients with HR-positive and HER2-negative breast cancer, based on a smaller sample size (HR = 9.96, 95% CI: 1.59–62.28, p = 0.014; Figure 3, Supplementary Figure 6). Here, ERBB2 is linked to breast carcinoma.