Figure 5 Representative immunohistochemical analysis of CCR7 in SLBs from (A, B) UIP, (C, D) NSIP, (E, F) RBILD, and (G, H) normal margin tumour patient groups. Panels (A), (C), (E), and (G) show control staining. CCR7 immunoreactivity (red staining) was seen in focal areas in SLBs from (B) UIP, (D) NSIP, and (F) RBILD, but not (H) normal margins. Original magnification, ×200. CCR7, CC chemokine receptor 7; NSIP, non‐specific interstitial pneumonia; RBILD, respiratory bronchiolitis/interstitial lung disease; SLB, surgical lung biopsy; UIP, usual interstitial pneumonia.