TGFB1 and posterior cortical atrophy: Multiple signaling pathways, including the NF‐κB, Notch, Wnt, and TGF‐β, have been well documented to be participated in bone metastasis of PCa (Fournier et al., 2015; Li et al., 2017b; Ren et al., 2017; Zayzafoon et al., 2004).