Interestingly, Pasculli and colleagues found no statistically significant associations between miR-155-5p expression and BC patients’ prognosis in the TCGA database, although they found that miRNA levels were associated with unfavorable prognostic factors, such as high tumor stages, reduced expression of ER and PgR, and high Ki-67 expression [102]. The gene discussed is MKI67; the disease is neoplasm.