Case presentation A 36-year-old woman was admitted to the hospital, suffering from progressively increasing breathlessness for two weeks. She also had a wheeze and productive cough with white sputum. She didn’t have chest pain or orthopnea but had a history of asthma. She has never been a smoker.

Examination: Respiratory rate of 22 breaths per minute Afebrile and normotensive A regular pulse rate of 88 per minute Cardiovascular and abdominal tests were normal Prolonged expiratory wheeze with reduced air entry at the left base The chest radiograph (PA) image is attached for your reference. *This case is from the Editorial Team of Docplexus and is meant for educational purposes only. The answer is posted in the comment section below!