ACTA1 and breast cancer: BC tissues (n = 54) exhibited significantly higher stromal cell expression of α-SMA than non-malignant breast tissues (n = 9) [data expressed as median (interquartile range), Mann-Whitney test]: 6 (5–7) vs. 4 (0–4), respectively (p = 0.0001; Benjamini-Hochberg adjusted p = 0.0065).