Immunohistochemistry for CD19 and ICAM1 in LSG of pSS and healthy control. (A, E) Infiltrating lymphocytes in LSG of pSS were positively staining for CD19 (200× and 400× magnification); (B, F) glandular epithelial cells from control were negative (200× and 400× magnification); (C, G) infiltrating lymphocytes and adjacent glandular epithelial cells in LSG of pSS were positively staining for ICAM1 (200× and 400× magnification). (D, H) Glandular epithelial cells from control were negative (200× and 400× magnification). (TIF 28780 kb