smoking and cancer diseases

Cancer is a complex group of more than 100 different types of cancerous diseases. Cancer can affect just about every organ in the human body.And cancer can also affect parts of the body like eyes and the heart. Each type of cancer is unique with its own causes, symptoms, and methods of treatment.

The organs in our body are made up of cells. Cells divide and multiply as the body needs them. When these cells continue multiplying when the body doesn't need them, the result is a mass or growth, also called a tumor.
These growths are considered either benign or malignant. Benign is considered non-cancerous and malignant is cancerous. Benign tumors rarely are life threatening and do not spread to other parts of the body. They can often be removed. Malignant tumors, however , often invade nearby tissue and organs,spreading the disease.
The cells within malignant tumors have the ability to invade neighboring tissues and organs, spreading the disease. It is also possible for cancerous cells to break free from the tumor site and enter the bloodstream, spreading the disease to other organs. This process of spreading is called metastasis.
When cancer has metastasized and has affected other areas of the body, the disease is still referred to the organ of origination. For example, if cervical cancer spreads to the lungs, it is still called cervical cancer, not lung cancer.
Although most cancers develop and spread this way--via an organ, the blood cancer like leukemia do not. They affect the blood and the organs that form blood and then invade nearby tissues.
Symptoms of cancers vary based on the type of cancer. As cancer progresses to an advanced stage, common symptoms can include weight loss,fever, and fatigue. These are very non-specific symptoms that are more likely related to other less serious illness than cancer.
There are four standard methods of treatment for cancer.
1.surgery 2. chemotherapy 3. radiation therapy and 4. immunotherapy.
Smoking is the most significant cancer risk factor . It is responsible for not only lung cancer, but many other types of cancer. One of the best ways to prevent cancer is to quit smoking . As soon as you quit smoking, your body reaps the benefits of being tobacco-free.
Reference--centers for disease control an prevention, USA

According to WHO release, Myanmar is the second most cancer-caused county in the world.