cCAFs classified as α-SMA+/K−/DAPI+/V±/CD45−CD31− were present only in 7 (3.3%) of the 210 breast cancer patients (range of 7–56 cCAFs/1 mln PBMCs and median of 25 cCAFs/1 mln PBMCs). Here, ACTA1 is linked to breast cancer.