Digital indirect fluorescent photomicrographs of axial and longitudinal sections from 2 CIDP patients and age- and sex-matched adult controls stained with monocyte/ macrophage marker CD68, B-lymphocyte marker CD19 and T-lymphocyte marker CD3 (green) with nuclei stained with DAPI (blue; A, D, G, J, M, P) to co-localize with CD11d expression (red, B, E, H, K, N, Q), showing increased endoneurial expression in CD68+ CD11d+ monocytes/ macrophages (C), CD19+ CD11d+ B-lymphocytes (I) and CD3+ CD11d+ T-lymphocytes (O) compared to controls (F, L, R). The white lines depict the abluminal membrane of endoneurial microvessels in order to highlight adherent luminal CD11d+ leukocytes. Scale bar = 25 μm.