Which of the following is the characteristic feature of adult respiratory distress syndrome?

Adult Respiratory Distress Syndrome (ARDS) Also called as Shock Lung, Diffuse alveolar damage or Acute lung injury In adult respiratory distress syndrome, there is damage to type-I / II pneumocytes as well as formation of hyaline membrane due to endothelial cell damage which increases vessel permeability - formation of membrane with fibrinogen-Hyaline appearance. The histologic manifestation of ARDS in the lungs is known as diffuse alveolar damage (DAD) the integrity of the alveolar-capillary membrane is compromised by endothelial and epithelial injury.