We observed that high expression of MERIT40 was associated with several markers of poor prognosis: SBR histological grade III (p = 0.03), high macroscopic tumor size (p = 0.0021), negative ERα status (p = 0.0052), negative PR status (p = 0.035), high MKI67 mRNA expression (p < 0.0001), and molecular subtypes (p = 0.0021) (Table 2). This evidence concerns the gene ESR1 and neoplasm.