Figure 4From: T cell immunohistochemistry refines lung transplant acute rejection diagnosis and gradingCD4 and CD8 IHC in lung transplant rejection diagnosis and grading. Tissue sections were immnunohistochemically stained with CD4 and CD8 antibodies and showed contrast against the background. A: grade A1 rejection; B: grade A2 rejection; C: grade A3 rejection; D: grade A4 rejection. (x200).Back to article page