Recently, the CXCL13‐CXCR5 axis has been implicated in the progression of various tumours, including colon cancer,21 hepatocellular carcinoma,22 chronic lymphocytic leukaemia,23 breast cancer,23 neuroblastoma 24 and prostate cancer.25 The gene discussed is CXCR5; the disease is Familial prostate cancer.