Cancer du sang, maladie extręmement grave qui frappe les enfants et les vieillards plus souvent que les adultes.
Alternate (chiefly British) spelling for leukemia.
Presence of excess leukocytes in blood due to affection of organs making blood.
Sinonimi: leukaemia | cancer of the blood
(Alternate spelling: leukaemia).
Malignant neoplasm of blood-forming tissues; characterized by abnormal proliferation of leukocytes; one of the four major types of cancer; SYN. leukaemia, cancer of the blood.
Any one of a group of cancers of the blood cells, with widespread involvement of the bone marrow and other blood-forming tissue. The central feature of leukemia is runaway production of white blood cells that are immature or in some way abnormal. These rogue cells, which lack the defensive capacity of healthy white cells, overwhelm the normal ones, leaving the victim vulnerable to infection. Treatment is with radiotherapy and cytotoxic drugs to suppress replication of abnormal cells, or by bone-marrow transplant.
Abnormal functioning of the bone marrow also suppresses production of red blood cells and blood platelets, resulting in anemia and a failure of the blood to clot.
Leukemias are classified into acute or chronic, depending on their known rates of progression. They are also grouped according to the type of white cell involved.