21st February 2025

A 74-year-old man with a history of asbestos exposure and a 50 pack-year smoking history is referred for pulmonary function testing by his GP after he reports symptoms of worsening breathlessness and a decline in his exercise tolerance.

A 74-year-old man with a history of asbestos exposure and a 50 pack-year smoking history is referred for pulmonary function testing by his GP after he reports symptoms of worsening breathlessness and a decline in his exercise tolerance. 

His lung function test results are as follows:

Based on the above results, which of these conditions is most likely to be the cause of his symptoms? 

Select the SINGLE most appropriate option from the list below. Select ONE option only.