Fig. 3

Histopathology of surgical lung biopsies of patient #6 (fibrosing NSIP, 72-years-old female, left S9). a, b Uniform fibrosis of the same age was observed diffusely in alveolar septa. Collapse was observed partially (square). c A higher magnification of an area of a square of (b) showing intraluminal and mural incorporation fibrosis and condensed elastic fiber of the alveolar walls. Staining: (a) Hematoxylin and eosin stain, (b, c) Elastica van Gieson stein, Magnification: (a, b) 4×, (c) 10×