Concomitant analyses of six biomarkers, including FAP, CD29 (integrin-β1), α-SMA, FSP1, PDGFRβ, and caveolin, characterized four CAF subsets (from CAF-S1 to CAF-S4) with distinct properties in ovarian and breast cancers (BC) [94, 98]. This evidence concerns the gene FAP and breast carcinoma.