FABP4 and posterior cortical atrophy: FABP4 is secreted from both PCa cells and adipocytes surrounding PCa tumors, and is believed to either shuttle fatty acids between adipocytes and tumor cells [75] or act as an inducer of MMPs from cancer cells and cytokines (e.g., IL‐6, IL‐8) from stroma cells to promote invasion and metastasis [34].