MRCP2-4455
A 65-year-old man presents to his GP with complaints of cough and dyspnoea on exertion. He reports having the cough for over 2 years, but it has worsened recently along with increasing shortness of breath. He denies any haemoptysis, chest pain or leg swelling. The patient has a smoking history of 60 pack-years and drinks a moderate amount of alcohol. His vital signs are stable with a temperature of 37.2ºC, blood pressure of 140/80 mmHg, pulse of 80/min, and respirations of 20/min.
On chest x-ray, there are prominent bronchovascular markings and mild diaphragmatic flattening. Pulmonary function tests reveal a forced expiratory volume in 1 second of 67% of predicted, forced vital capacity of 95% of predicted, and an FEV1/FVC ratio of 0.65. Carbon monoxide diffusion capacity is 100% of predicted value.
What is the most likely cause of this patient’s symptoms?