ITGA1 and posterior cortical atrophy: Interestingly, we also found that several cell cycle‐related pathways including E2F targets and G2M checkpoint were highly enriched in PCa tumors with ITGA1/ITGA2 loss/del (Figure S1e–h, Supporting Information), further implicating the functional role of ITGA1/ITGA2 loss/del in PCa tumorigenesis and metastasis.