Cancer simply defined is the abnormal growth of cells in some part of the body. It may occur in the brain, the lungs or even the breasts. This article will cover 2 different types of cancers and their causes. causes of cancer may be different depending on the type. However, one factor, heredity, results in both cancers.

The causes of cancer are unidentified. Nonetheless, one of the primary causes of cancer is heredity. Reports from the medical fraternity cite that one is at a much higher risk of developing cancer, if there are family members with the disease. Most cancers are then as a result of hereditary factors. Case in point, brain and ovarian cancer may be linked to heredity. Prior history of the victim is another primary cause of the cancers. The cancers are more likely to develop again in the people who have at one time or another suffered from them. Other factors related to the external environment may cause various types of cancer.

Two major factors also cause cancer. These are air pollution and smoking. Other cancer causing factors include sunlight and radiation. While there are many cancer forms, lung cancer due to smoking, is the most common in the United States. Cigarette smoking results in 90% of all the lung cancer reported cases in the US. Active smokers are the main victims. Even so, there is a 24% chance of passive smokers to develop lung cancer. Air pollution accounts for 1% of the lung cancer related cases. In this case the causes of lung cancer are exposure to pollution from vehicles, power plants and industries.

The victim’s personal situation and the cancer causes may be linked. For instance, a probable cause of cancer especially in women is hormones. Women who begin their menstruation much earlier and also those who enter menopause much later are at the greatest risk of developing breast cancer. Along with this, is the use of hormone replacement therapy especially by women after menopause which are also possible causes of breast cancer. Though birth control pills are also said to result in breast cancer, there is no fool proof indication.

Factors such as heredity and prior history with the disease are said to be the principal causes of cancer. However, particular cancers have particular causes. Consequently, breast cancer may be said to occur as a result of the use of hormone replacement therapy, hormones and even the use of birth control pills. Conversely, lung cancer is said to be caused by smoking and air pollution.