Cancer is one of the most dangerous diseases of all times. It is easier to diagnosis is easy to made, but many types of cancer are hard to heal. In order to anticipate it a proper way of life, healthy lifestyle is necessary. Unfortunately there are many types of cancer, more than a hundred, which can be grouped in different categories.

The main categories are: leukemia (the type of cancer that starts in the blood cells, the blood-forming tissues), central nervous system cancers, carcinoma (cancer that attacks the skin), lymphoma and myeloma (those types of cancer that begin in the cells of the immune system) and sarcoma (cancer that starts in the bones, fat, muscle, cartilage and bone vessels). All of these cancer types are extremely dangerous and in many cases, when the diagnosis happens too late, fatal.

Every cancer types attack the cells of the body. The cells are the basic elements of our human body, so it is important to know how they work. Human cells are always dividing, after a time these cells go old, new ones come in their place. Cells are needed in order to keep our body healthy, so it is important the proper production and division. Sometimes the production does not work properly; the cells get damaged or changed. In these cases there can easily be mutations that affect healthy cell growth and division. New cells appear, older do not die, and extra cells form a tumor. These tumors can appear in every part and can affect the human body, mostly when they lead t cancer. Of course not every tumor is cancerous, but most of them are. Most of the cancer types appear as a consequence of a tumor, but cancer types such as leukemia do not form tumors.

Cancer can easily attack other organs of the body, they can spread fast. This process is called metastasis. Malignant tumors, which are cancerous, can invade nearby organs of the affected area. The causes of cancer are different according to the type of cancer. Some of the major causes are viruses or bacteria, tobacco, growing old, sunlight, hormones, alcohol, chemicals, diets, radiations, or it can be inherited in people’s genes. Many of the factors can be avoided, if careful, but some, such as family history cannot be. One of healthy people’s main problem is being afraid of people who have cancer, they should not, because cancer isn’t contagious such as AIDS.

Today there are methods which can fasten the healing, but in order not to get cancer, people should avoid unhealthy lifestyle, should consult with their doctor immediately when something abnormal appears on and in their body. Remaining or getting healthy is not just our doctors’ responsibility. After all we have to take care of our body.