Most cases of adenocarcinoma are associated with smoking; however, among people who have smoked fewer than 100 cigarettes in their lifetimes ("never-smokers"), adenocarcinoma is the most common form of lung cancer.
Kebanyakan kasus adenokarsinoma dihubungkan dengan kebiasaan merokok; namun, di antara orang-orang yang merokok kurang dari 100 rokok sepanjang hidup mereka ("tidak pernah merokok"), adenokarsinoma merupakan jenis kanker paru yang paling umum.