Cancer is usually one of the sorts of malignant tumors. In fact, the cancer is only a part of a malignant tumor. The malignant tumor has a property to spread not only into the next situated matters but also to spread by the blood to other organs of the body. When the tumor is in the other organ it grows quickly and pulls nourishing matters from the whole body.
The cancerous growths in their development have different stages. The systems of cancer staging and solid cancer staging are the following. In decency on the size of spread to the next situated matters and organs the cancerous growths are classified into four stages. The general principles are:
1) The first stage - when the cancerous growths are not large, usually they have the size till two centimeters. They don't have any metastases. The first stage of the cancerous growths is tumors of the internal organs of the body. It is an early cancer.
2) The second stage - when the cancerous growths have bigger size, from two to five. Usually it has one metastasis.
3) The third stage -when the cancerous growths are of big sizes which are in all organs of the body. They have many metastases.
4) The fourth stage - when the cancerous growths are of bigger sizes. They are stable, unmovable. One can't cut them out.
One of very important problems of the medicine is the blood cancer. One should say about the blood cancer staging. There are some systems of cancer staging. The blood tumors are divided into two groups - leucosis and lymphoma. The leucosis is system tumors of the haematogenic matter. The lymphomas are the regional tumors.
Nowadays one classification of systems of cancer staging is very popular. It is called as a FAB-system. In according to this system of cancer staging there are three variants of the leucosis. For example, they are L1, L2, and L3.
The leucosis and lymphoma represents about eight per cent of all the malignant tumors. They are one of six sorts of the malignant tumors. For example, in the USA about twenty thousand people get ill with the leucosis, about fifteen thousand people die. The mortality level during the previous decade reduced because of treatment affectivity.
There are many reasons of the blood cancer. Swedish scientists, for example, found the connection between an allergy among children and the blood cancer among the adults. But it is an argue question. Some scientists think that allergy defends the organism from the cancer.
Italian scientists made researches and found out that exhaust gas influence every inhabitant of a city making the cancer development higher. The scientists investigated about one thousand children who live in different origins of the country. One hundred and thirty of them were ill with the blood cancer. The others were healthy.
The scientists analyzed the factors of the environment which influence the health. The results of these researches showed that the sick children were more often under the influence of petrol high concentration. So, the conclusion was that constant exhaust gas influence made the leucosis development higher.
Thus, there are different systems of cancer staging. The cancer is a very important illness. Many people die from it every year. But nowadays there are many effective medicine methods of treatment to cure it. One needs to hope for the best that more and more people every year will be cured.