ESR1 and maternal uniparental disomy of chromosome 20: TRPS1 exhibited a larger portion of strong positivity among the positive cases in TNBC-MBCs (112/137 [81.8%]) compared with the ER/PR+ (313/526 [59.5%], adjusted p < 0.001) or HER2+ (177/324 [54.6%], adjusted p < 0.001) group (Table 1).