What mean Leukemia


What is leukemia?


Leukemia is a type of cancer. Cancer is a group of more than 100 patients have two important things in common. One is that certain cells in the body become abnormal. Thing is that the body continues to produce large number of abnormal cells.

Leukemia is cancer of the blood cells. Each year, nearly 27,000 adults and 2,000 children in the United States know leukemia. To understand leukemia, it is helpful to know about normal blood cells and what happens to them when developing leukemia.

Normal blood cells.

Blood consists of fluid called plasma and three types of cells. Each type has its own function.

White blood cells help the body fight infections and other diseases.

Red blood cells carry oxygen from the lungs to the body tissues and take carbon dioxide from the tissues back to the lungs. Red blood cells red blood.

Platelet cells help create blood clots to control bleeding.

The blood cells are formed in the bone marrow, the soft spongy center of bones. The new blood cells (immature) are called immature cells. Few immature cells in the marrow to mature. Some to other parts of the body to mature.

Normally, blood cells are produced in the order, is controlled manner when the body needs them. This process keeps us healthy.

Leukemia


When leukemia develops, the body produces large numbers of abnormal blood cells. In most types of leukemia, the abnormal cells are white blood cells. Leukemia cells (usually look different from normal blood cells and they do not perform their functions properly).

Why is blood cancer?


Until now, we still do not know why cause leukemia. The researchers are trying to solve this problem. The study found that leukemia is more common in men than women and whites more often infected black people. However, we still can not explain why one person, and the other is not.

Through the study of large numbers of people around the world, researchers have found certain risk factors increase the risk of developing leukemia. For example, exposure to large amounts of high-energy radiation increases the risk of leukemia. The radioactive material is usually produced after the explosion of the atomic bomb in Japan during World War 2. In nuclear power plants, the absolute safety rules to protect workers and the public to avoid contact with harmful radiation volume.

Research suggests that exposure of the electromagnetic field is a risk factor for leukemia (the electromagnetic field is a type of low-energy radiation from power lines and electrical equipment). However, more research is needed to prove this link.

Some genetic conditions can increase the risk for leukemia. It is Down syndrome. Children born with this syndrome have leukemia than other children.

The workers exposed to certain chemicals, in the long term will have a higher risk of blood cancer. Benzene is one of the chemical. At the same time, some drugs used to treat other types of cancer may increase the risk for the development of leukemia. However, this risk is very small compared to the benefits that chemotherapy brings.

Scientists have identified the virus is likely to increase the risk of leukemia. Scientists around the world continue to study viruses and other possible risk for leukemia. By following the study because of blood cancer, which scientists hope to better understand the methods for the prevention and treatment of leukemia.

What type of blood cancer?


There are several types of leukemia. They are arranged in two ways. One way is by the rapid development and how bad how. Otherwise affected by the type of blood cells.

Leukemia either grant or chronic. In acute leukemia, the abnormal blood cells are immature cells preserved characteristics of immature and can not perform their normal functions. The number of immature cells increased rapidly, and the disease became rapidly worse.

In chronic leukemia, a number of cells are present, but in general, these cells were more mature and able to perform some of their normal functions. Leukemia can occur in both types of white blood cells: white blood cells or marrow cells. When leukemia affects lymphoid cells, it is called lymphocyte leukemia. When the marrow cells are affected, the disease is called leukemia or bone marrow marrow.

These are the most common types of leukemia:


Acute lymphoid leukemia line is the most common form of leukemia in children. Also cause disease in adults, especially at the age of 65 or older.

Myeloid leukemia most often affects people older than 55. It usually occurs in younger people, but almost never causes disease in children.

Chronic myeloid leukemia mostly occurs in adults. Very few children develop this disease.

Hairy cell leukemia is a chronic leukemia's not normal. This category and other unusual types of leukemia are not discussed here. Cancer Information Service can provide information about them.

This disease also affects adults, especially those age 65 and older.

The symptoms of leukemia?


Leukemia cells is abnormal can not work normal blood cells do. We can not help the body fight infections. For this reason, people with leukemia often prone to infection and fever.

At the same time, people with leukemia often have the number of red blood cells and platelets less than normal. As a result, there is not enough red blood cells to carry oxygen to all organs in the body. This condition is called anemia, patients may look pale and feel weak and tired. When there is not enough platelets, patients bleed, skin bruising.

Like all blood cells, leukemia cells travel throughout the body. Depending on the number of abnormal cells and where these cells concentrate, patients with leukemia may have a number of symptoms.

In acute leukemia, symptoms appear rapidly and become worse. People with this disease often go to the doctor because they feel sick quickly. In chronic leukemia, symptoms may not appear for a long time. When these symptoms appear, at first gently, then gradually go bad. Doctors discovered leukemia chronic medical examination and routine blood tests, despite that the patient does not have any symptoms.

What are the common symptoms of leukemia:


Fever, chills, and other flu-like symptoms.

Weak and tired.

Frequent infections.

Poor appetite and weight loss.

Painful swelling of lymph nodes, liver, splenomegaly.

Easy bruising and bleeding.

Swelling and bleeding tooth.

Sweating, especially at night.

Bone and joint pain.

In acute leukemia, the abnormal cells may be concentrated in the brain or spinal cord (also called the central nervous system). The result can be headaches, vomiting, confusion, loss of muscle control, and seizures. In leukemia, the cells can also be set in the testicles and cause swelling. Some patients than pain in the eyes or on the skin. Leukemia also can affect the digestive tract, kidneys, lungs, or other parts of the body.

In chronic leukemia, the abnormal blood cells can slowly set in many parts of the body. Chronic leukemia may affect the skin, central nervous system, the digestive tract, kidney, and testis.