For lung cancer, tobacco smoke is involved in 85-90% of cases and increases the risk of lung cancer 20-30 times compared with non-smokers.

According to K Hospital, lung cancer is one of the three most common cancers and the leading cause of cancer death globally.



In Vietnam, lung cancer ranks second only after liver cancer, with an estimated 23,000 new cases each year, nearly 21,000 deaths and this number is constantly increasing.


There are many factors that increase the risk of lung cancer. Here are the top factors listed:


- Tobacco


For lung cancer, tobacco smoke is involved in 85-90% of cases and increases the risk of lung cancer 20-30 times compared with non-smokers. Tobacco smoke is also linked to cancers of the head, face, and neck, kidney, bladder, uterus, and esophagus. In addition, smoking also contributes to an increase in cardiovascular and respiratory diseases.


In tobacco smoke there are more than 7,000 toxic substances and at least 69 substances are known to cause cancer. People who smoke cigarettes regularly and for a long time, accumulate toxins that cause gene mutations that lead to the formation of malignant tumors. Subjects with a high risk of tobacco-related lung cancer were defined as those over the age of 50 who smoke more than 20 packs of cigarettes/year.


Experts give specific examples, if a 60-year-old man smokes 20 cigarettes in a day and smokes for 30 years, applying the above formula, the number of packs/year of this person will be 30 and the person will smoke. This is a high-risk group for lung cancer.


In these patients, even if they have quit smoking for less than 15 years, annual low-dose computed tomography screening is still needed to detect lung cancer suspicious images for early diagnosis. , early treatment and an opportunity for lung cancer patients to recover.


Not only smokers themselves are at risk of lung cancer, those around them who are regularly exposed to secondhand smoke or commonly known as passive smokers also have a significantly increased risk of lung cancer compared to those around them. people who are not exposed to secondhand smoke.


- In addition to cigarette smoke, carcinogens such as aminog, arsenic, and radioactive substances are risk factors for lung cancer.


- Patients with head and neck cancer, bladder cancer, or patients who have previously received radiation therapy to the chest area show a significantly increased likelihood of developing primary lung cancer.


- Family history of lung cancer is also a remarkable factor in screening for early detection of lung cancer


- Having related diseases


In addition, patients with tobacco-related background diseases such as Chronic obstructive pulmonary disease or pulmonary fibrosis is also a risk factor for lung cancer.


Lung cancer in the early stages often has no symptoms or symptoms are often very faint, even when symptoms begin to be at an advanced stage. Here are the symptoms suggestive of lung cancer that readers cannot ignore:


- Prolonged dry


cough - Coughing blood


- Dull chest pain


- Difficulty breathing, difficulty swallowing


- Unexplained weight loss