What is the most common lung cancer in nonsmokers?

Adenocarcinoma is recognized as the most common type of lung cancer observed in nonsmokers. This type of cancer primarily originates from the mucus-secreting glands in the lungs and is characterized by its growth pattern and histological features that can differentiate it from other types, such as squamous cell carcinoma or small cell carcinoma.

Adenocarcinoma is more frequently found in the peripheral regions of the lungs and has become increasingly prevalent, particularly among individuals who have never smoked. Its association with latent factors, such as exposure to certain environmental pollutants or genetic predispositions, has also contributed to its rise in incidence within this population. In contrast, other types of lung cancer, such as squamous cell carcinoma and small cell carcinoma, are more commonly linked with smoking history, making adenocarcinoma the primary lung cancer type among nonsmokers.

The distinction of adenocarcinoma in nonsmokers emphasizes the evolving understanding of lung cancer epidemiology and the influence of non-tobacco-related risk factors.