Malignant cells in follicular lymphoma, which mimics the architectural and cellular structures of normal secondary lymphoid follicles in ectopic neoplastic foci, were shown to express CXCR5, secrete CXCL13, and migrate in response to CXCL13, suggesting that CXCL13 recruits malignant B-cells to ectopic germinal centers and contributes to their development (67). The gene discussed is CXCL13; the disease is follicular lymphoma.