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Lung cancer is the most diagnosed and deadliest cancer worldwide, with 2.2 million cases in 2020 resulting in 1.8 million deaths. [3] Lung cancer is rare in those younger than 40; the average age at diagnosis is 70 years, and the average age at death 72. [2] Incidence and outcomes vary widely across the world, depending on patterns of tobacco use.
The signs and symptoms of this specific type of lung cancer are similar to other forms of lung cancer, and patients most commonly complain of persistent cough and shortness of breath. Adenocarcinoma is more common in patients with a history of cigarette smoking, and is the most common form of lung cancer in younger women and Asian populations.
The most common cause of non-small cell lung cancer is a history of smoking. Other risk factors include exposure to radon, asbestos, secondhand smoke, and other chemicals.
Adenocarcinoma of the lung is currently the most common type of lung cancer in "never smokers" (lifelong nonsmokers). [10] Adenocarcinomas account for about 40% of lung cancers. Historically, adenocarcinoma was more often seen peripherally in the lungs than SCLC and squamous-cell lung cancer, both of which tended to be more often centrally located.
Non-small cell lung cancer (NSCLC) is the most common form of lung cancer, accounting for 80-85% of all cases. It develops when abnormal lung cells grow uncontrollably, forming a tumor.
Doctors shared common early-missed signs of lung cancer and what to do if you're concerned. Related: The #1 Early Sign of Prostate Cancer Most People Miss, According to an Oncologist and Urologist.
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