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. 2009 Jan 15;6(1):54–65. doi: 10.1513/pats.200808-080GO

Figure 3.

Figure 3.

Pathologic examples of acute lung allograft rejection. (A) Grade A1 acute rejection with rare perivascular lymphocytes (hematoxylin and eosin [H&E] staining; ×40). (B) Grade A2 acute rejection with a prominent perivascular mononuclear infiltrate (H&E staining; ×40). (C) Grade A3 acute rejection with extensive perivascular infiltrate extending into perivascular spaces (H&E staining; ×40). (D) Grade A4 acute rejection with a diffuse mononuclear infiltrate with lung injury (H&E staining; ×40). (E) Grade B2R (high grade) lymphocytic bronchiolitis with dense peribronchiolar mononuclear infiltrate (H&E staining; ×40). (F) Immunofluorescence on frozen lung tissue, demonstrating positive C4d staining in subendothelial space and within alveolar septae (immunofluorescent staining; ×400).