<prompt> Batwing appearance on X-ray chest is seen in:Bronchial asthmaCardiogenic pulmonary edemaMitral stenosisPulmonary embolism  <response>: In Cardiogenic pulmonary edema: Butterfly or Bat wing appearance i.e., consolidated hilum uninvolved lung coex on CXR. The centralperihilar distribution is supposed to be due to increased fluid accumulation in central alveoli due to their increased elastin content. Chest radiograph shows: Cardiogenic pulmonary edema Non-cardiogenic pulmonary edema Enlarged cardiac silhouette Hea size is normal Vascular redistribution Alveolar infiltrates are distributed more uniformly Interstitial thickening and perihilar alveolar infiltrates Pleural effusions are common Pleural effusions are uncommon 