BDP1 copy number is significantly decreased in triple-negative breast cancer, p = 1.04 × 10−21, n = 3785 samples across three datasets [40,44,47], as shown in Figure 5A. Approximately 70% of TNBCs has been demonstrated to undergo deletions spanning the long arm of chromosome, including 5q13-14 [51], and BDP1 is located at 5q13.2. The gene discussed is BDP1; the disease is triple-negative breast carcinoma.