Human lung cancer is a type of cancer that originates in the lungs, typically in the cells that line the air passages. There are two main types of lung cancer: non-small cell lung cancer (NSCLC) and small cell lung cancer (SCLC). NSCLC is the more common type, accounting for approximately 85% of all lung cancers, while SCLC accounts for the remaining 15%.

Lung cancer is typically caused by exposure to carcinogens, such as tobacco smoke, air pollution, and occupational hazards like asbestos. Other risk factors include a family history of lung cancer, exposure to radon, and certain genetic mutations.

Symptoms of lung cancer can include a persistent cough, chest pain, shortness of breath, coughing up blood, and weight loss. However, in many cases, lung cancer does not cause noticeable symptoms until it has reached an advanced stage.

Treatment options for lung cancer depend on the stage of the cancer and can include surgery, radiation therapy, chemotherapy, targeted therapy, and immunotherapy. Prognosis also varies depending on the stage and type of lung cancer, as well as the patient’s overall health. Early detection and treatment can improve outcomes for patients with lung cancer.