What is leukemia?
Leukemia is cancer
that originates in blood-forming tissue. The disease is characterized by the
uncontrolled growth of blood cells, usually white blood cells (leukocytes), in
the bone marrow. White blood cells are a fundamental component of the body's immune
response. The leukemia cells crowd out and replace normal blood and marrow
cells.
How Leukemia Develops
Leukemia is classified in two ways. One way is by the type
of white blood cell that is affected (lymphoid or myeloid cells). Another way
is by how quickly the disease develops and gets worse, meaning whether it is
acute (fast-growing) or chronic (slow-growing).
Lymphocytic Versus Myeloid Leukemia
Lymphocytic leukemia (also known as lymphoid or
lymphoblastic leukemia) develops in the white blood cells called lymphocytes
within the bone marrow. Myeloid (also known as myelogenous) leukemia may also
start in white blood cells other than lymphocytes (e.g., monocytes), as well as
red blood cells and platelets.
Acute Versus Chronic Leukemia
Acute leukemia is rapidly progressing and results in the
accumulation of immature, functionless blood cells in the bone marrow. With
this type of leukemia, cells reproduce and build up in the marrow, decreasing
the marrow’s ability to produce enough healthy blood cells. Chronic leukemia
progresses more slowly and results in the accumulation of relatively mature,
but still abnormal, white blood cells.
Also Read >> Symptoms of Leukemia (Blood Cancer)
Also Read >> Symptoms of Leukemia (Blood Cancer)
0 comments: