Bronchitis and emphysema (also known as chronic obstructive airways disease) are inflammatory conditions affecting the lungs and the airways leading into them (the bronchi) and are not cancerous.

Having bronchitis and emphysema do not increase the risk of getting lung cancer. But bronchitis and emphysema are very often due to smoking which is the main cause of lung cancer.

This means that people with chronic obstructive airways disease develop lung cancer more than non smokers, because of smoking.

So someone who has never smoked who has bronchitis and emphysema is not at any increased risk of developing lung cancer. But someone who has smoked and has chronic obstructive airways disease is at greater risk because of smoking, not because of their bronchitis.