The lungs are the respiratory organs located in the chest of the ribs and consist of a thin moist membrane that increases its surface area. Therefore, the exchange of oxygen and carbon dioxide takes place on one side with air on the other side of the membrane. You can read the article to know more about genetic testing for lung cancer.

Lungs ventilated with respiratory motion using a pouch attached to the bronchi through the bronchioles. Lung cancer is a disease that affects the lungs by uncontrolled cell growth that may spread beyond the lungs in the form of metastasis to other body areas. 

Globally, this cancer is the most common kind of cancer death in the United States and has caused 1.4 million deaths in 2004. It is the third most common cancer as the cancer-related deaths in the United States with the highest breast and prostate occurs more often. Less than 15% of the cancer is caught at an early stage, which makes the fight against the disease more difficult.

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Symptoms of lung cancer include:

• Breathlessness including wheezing and hoarseness
• Chest pain or pain in the abdomen
• chronic cough, coughing up blood, or a change in the pattern of cough
• Weight gain, fatigue, and loss of appetite and difficulty swallowing

Among the main causes of lung cancer, smoking in particular accounts for a large percentage, about 85% of those affected by the disease. 20,000-30,000 people diagnosed with this cancer each year. Surprisingly, about 10-15% of these patients have never smoked in their lives, thus, showing that secondhand smoke has greatly affected their ability to get cancer.