Recently, it has been shown that CHI3L1 binds interleukin 13 receptor alpha‐2 (IL‐13Rα2) and that CHI3L1, IL‐13Rα2, and IL‐13 form a multimeric complex.11 To explore the role of CHI3L1 in PCa metastatic behavior, we first validated the previous cytokine array data by ELISA (Figure 6A). This evidence concerns the gene IL13 and posterior cortical atrophy.