Fig. 4

Immunohistochemistry of the biopsy specimen. a TTF-1 alveolar epithelium cells ( +) (magnification, × 100). b TTF-1 alveolar epithelial cells ( +) (magnification, × 200). c p53 scattered alveolar epithelial cells (+ , wild type) (magnification, × 100). d p53 scattered alveolar epithelial cells (+ , wild type) (magnification, × 200). e Ki-67 ( +) in individual alveolar epithelial cells, with a positive index less than 2% (magnification, × 100). f Ki-67 ( +) in individual alveolar epithelial cells (magnification, × 200). g CD68 (+ +) tissue cells of the alveolar cavity (magnification, × 100). h CD68 (+ +) tissue cells of the alveolar cavity (magnification, × 200). Microscope: Nikon Eclipse 80i; Microscope camera: LG300; Acquisition software: Toup View 3.7