Exposure to Toxins
Previous Radiation Therapy
Compromised immune system
● Non-small cell lung cancer – Most common type can either be squamous cell carcinoma, adenocarcinoma, or large cell carcinoma.
● Small-cell lung cancer – This is not a very common type but can spread rapidly.
● Lung carcinoid tumor – The neuroendocrine cells affect.
● Lung Metastasis-It starts from the cells originating from somewhere else in the body.