Fig. 4From: Acute fibrinous and organizing pneumonia: two case reports and literature reviewHistologic findings of case 2 on lung biopsy. Hematoxylin and eosin stain (A, ×100) (B, ×200) showed there was interstitial fibrosis and abundant of fibrous exudate filled in the alveoli(arrows), which was highlighted by Masson’s trichrome stain (C, ×100) (D, ×200) (arrows)Back to article page