Four different CAF subsets identified by analyzing specific CAF markers (FAP, integrin β1/CD29, αSMA, S100‐A4/FSP1, PDGFRβ, and CAV1) have been reported and related to immune modulation in human breast and ovarian cancers (Costa et al, 2018; Givel et al, 2018). Here, PDGFRB is linked to ovarian cancer.