ERBB2 and breast cancer: Kaplan-Meier curves were also assessed to analyze their prognostic value, and the results showed a significantly shorter disease-free survival (DFS) in HER2+ BC patients with a high expression of miR-146a-5p, compared to those with lower miR-146a-5p levels (Hazard ratio (HR) = 2.677, 95% Confidence Interval (CI) 1.040–6.018, p = 0.043) (Figure 2B).