Stromal factors in prostate cancer that we previously identified as associated with survival of prostate cancer patients in this TMA are PDGFRβ [22], hyaluronan [23], Caveolin-1 (Scherdin et al, unpublished) androgen receptor [24], mast cells [25] and von Willebrand factor [19]. Here, PDGFRB is linked to Familial prostate cancer.