Sudden onset of cough followed by increasing dyspnea is characteristic of

PatientsMC presents with chest pain, often sharp and pleuritic and may lead to severe respiratory embarrassment or becomes dull and persistent.Dyspnea is the 2nd MC symptom.Less common symptoms include a nonproductive cough and ohopnea.Physical findings may be normal if the Pneumothorax is less than 25%.Characteristic physical finding includes diminished chest excursion and (Refer: Harrison's Principles of Internal Medicine, 18th edition, pg no: 2181, 2221, 3212)