Clinical significance of CXCR5 expression in SACC patients. (A) Immunohistochemical staining of CXCR5 in normal salivary gland (NSG), SACC without PNI (No-PNI), far away from nerve of SACC with PNI (Far-nerve), nerve invasion front of SACC with PNI (Nerve-front). ‘N’ represented nerve. (Bar: upper, 50 μm; lower, 20 μm) (**p < 0.01, ***p < 0.001). (B) Kaplan-Meier survival analysis on SACC patients with different expression status of CXCR5. The overall survival time for patients without or with low CXCR5 expression was longer than those with high CXCR5 expression (log-rank test, p < 0.0001).