9 types of cancer most closely related to tobacco

1. Lung cancer:According to doctors at the Respiratory Center of Bach Mai Hospital, tobacco is the culprit causing 25 different diseases and is the leading cause of lung cancer.

Statistics also show that about 87% of the 177,000 new cases of lung cancer in the US in 1996 were due to tobacco, the rest were due to other causes such as: environmental pollution, occupational diseases, diet, constitution and genetic factors. 90% of the 660,000 cases of lung cancer diagnosed annually in the world are in smokers.

Smokers are 10 times more likely to develop lung cancer than non-smokers. The increased risk varies depending on the type of cancer cell.

In addition, smokers also have increased viral infections, increased common bacterial infections, increased tuberculosis, increased chronic lung diseases, especially chronic obstructive pulmonary disease.

2. Esophageal cancer

Smokers' risk of developing esophageal cancer is eight to 10 times greater than that of nonsmokers. These risks increase by 25 to 50 percent if smokers also drink a lot of alcohol.

3. Laryngeal cancer

Smoking causes 80% of all laryngeal cancers. Smokers are 12 times more likely to develop laryngeal cancer than nonsmokers.

4. Oral cancer

Tobacco use is the main cause of cancers of the tongue, salivary glands, mouth and throat. Men who smoke are 27 times more likely to develop oral cancer than men who do not smoke.

5. Nasal cancer:In the long term, smokers are twice as likely to develop nasal cancer as non-smokers.

6. Kidney and bladder cancer

Smokers are at increased risk of both kidney and bladder cancer. An estimated 40 to 70 percent of bladder cancer deaths are due to tobacco use.

7. Pancreatic cancer

The pancreas is a vulnerable gland to cancer because cigarette smoke enters the body and reaches the pancreas through the blood and gallbladder. It is estimated that smoking is the cause of 30% of all pancreatic cancers.

8. Genital cancer

- Vulvar cancer:Cancer of the vulva, a part of the female reproductive system, is normally rare. However, women who smoke are twice as likely to develop vulvar cancer.

- Uterine cancer:The link between smoking and uterine cancer has only recently been discovered. At least 12 studies have found that women who smoke have an increased risk of uterine cancer, and the risk increases with the amount and duration of smoking.

- Penile cancer:Penile cancer has become increasingly common in men who smoke than in men who do not smoke.

9. Anal and colorectal cancer

Recent evidence has shown that smoking is a risk factor for anal and colorectal cancer. In a large-scale study conducted in the United States, male and female smokers had a 75 to 100 percent increased risk of cancer compared to non-smokers of the same age.