This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Shock lung is characterized by ? \nSelect and explain. \nA. Alveolar proteinosis, B. Bronchiolitis obliterans, C. Diffuse pulmonary hemorrhage, D. Diffuse alveolar damage', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Diffuse alveolar damage Make it clear that shock lung is a synonym for acute respiratory distress syndrome, diffuse alveolar damage acute alveolar injury and acute lung injury. - Shock lung = ARDS = Diffuse alveolar damage = Acute alveolar injury = acute lung injury Pahology i) Acute stage - The lungs are heavy firm, red and boggy and exhibit congestion, interstitial and intraalveolar edema, inflammation and fibrin deposition. - The alveolar walls become lined with waxy hyaline membranes that are morphologically similar to those seen in hyaline membrane disease of neonates. - The hyaline membrane contains fibrin rich edema fluid mixed with the cytoplasmic and lipid remnants of necrotic epithelial cells. ii) Organizing stage - In this stage type II epithelial cells undergo proliferation in an attempt to regenerate the alveolar lining. iii) Resolution - Resolution is unusual', 'role': 'assistant'}]