Fig. 1From: Prognosis of nonspecific interstitial pneumonia correlates with perivascular CD4+ T lymphocyte infiltration of the lungDistribution of T lymphocytes in different regions of lung tissue: CD4+ and CD8 + T lymphocytes decreased gradually in order of Lymphoid follicle, perivascular, interstitial and peribronchiolar regions. Positively stained of CD4+ and CD8 + T lymphocytes with dark brown stainingBack to article page