<prompt> Which of the following is the most characteristic feature of Adult Respiratory Distress Syndrome ARDS:Diffuse Alveolar DamageHypoxemia and HypoxiaSurfactant DeficiencyHypocapnia  <response>: Answer is A Diffuse Alveolar Damage: Diffuse Alveolar Damage DAD is the histopathological hallmark of Acute Respiratory Distress Syndrome ARDS and the most characteristic feature amongst the options provided. Diffuse Alveolar Damage is often used as a synonym for ARDS. The pathological hallmark of ARDS is Diffuse Alveolar Damage - Thoracic Imaging Thieme 2010Case 78 The histological hallmark of ARDS is Diffuse Alveolar Damage - Intensive Critical Care Medicine Springer 2009210 Synonyms for ARDS Diffuse Alveolar Damage Shock Lung Blast Lung Traumatic Wet Lung Congestive Atelectasis Do Nang Lung Noncardiogenic Pulmonary Edema 