The right diagnosis can be determined, only, if the biopsy of pleural scarring is performed, because same symptoms and CT scan result can be found in three different diseases, like asbestosis (chronic inflammatory disease, linked exclusively with asbestos exposure, even 40 years ago), pleural mesothelioma (cancer of lung membrane lining due to asbestos exposure) and lung cancer.
Emphysema is lung disease when lungs ability to expel air is impaired, resulting from lost lung elasticity.
Inhaled asbestos particles are known to cause this kind of damage.
Bronchectasis is condition of widened airways (bronchi) cause their wall structures (muscle and elastic fibers) are damaged.
This leads to very frequent, almost chronic lung infections and further damages.
Different chemicals, and, also, cigarettes smoke, can cause it.
Best wishes!
Marija