59. In the pathology lab, you receive a lung specimen of a 61 year old female, with the clinical details 'dyspnea'. The lungs are dark red, firm, airless and heavy. Microscopic examination shows capillary congestion, necrosis of epithelial cells, interstitial oedema and harmorrhage, and neutrophils. There are hyaline membranes around the alveolar ducts.. What is the likely cause and which stage is this patient in?
Acute respiratory distress syndrome - acute phase (particularly characteristic are hyaline membranes)