Leukemia is a cancer of the blood and bone marrow. In simple terms, cancer is defined as the uncontrolled growth of abnormal cells. In leukemia the level of white blood cells increases.

Leukemia Symptoms
Different types of leukemia can cause different problems. Symptoms include :-
- Weakness or fatigue
- Bruising or bleeding easily
- Fever or chills
- Infections that are severe or keep coming back
- Pain in your bones or joints
- Headaches
- Vomiting
- Seizures
- Weight loss
- Night sweats
- Shortness of breath
- Swollen lymph nodes or organs like your spleen
How is it cause:-
Scientists don’t understand the exact cause of leukemia. It seems to develop from a combination of genetic and environmental factors.
How leukemia forms:-
In general leukemia thought to occur when some blood cells acquire mutations in their DNA — the instructions inside each cells that guide its action. Or other changes in the cells that have yet to be fully understood could contribute to leukemia.
Classification OF LEUKEMIA
On basis of speed of development they are two types:-
- Acute Leukemia - Acute leukemia is a fast-growing leukemia that progresses quickly without treatment.
- Chronic Leukemia - Chronic leukemia is a slow-growing leukemia.
On basis of type of cell is involved, is divided into lymphocytic and myelogenous leukemia.
- Lymphocytic - leukemia involves bone marrow cells that become lymphocytes, a kind of white blood cell.
- Myelogenous - involves the marrow cells that create red blood cells, platelets, and other kinds of white blood cell.
Types of leukemia
- Acute lymphocytic leukemia(ALL) — This is the most common form of Childhood leukemia. It can spread to your lymph nodes and central nervous system.
- Acute myelogenous leukemia (AML) — This is the second most common form of childhood leukemia and one of the most common forms for adults.
- Chronic lymphocytic leukemia (CLL) — This is the other most common form of adult leukemia.
- Chronic myelogenous leukemia (CML) — With this form, you might not have noticeable symptoms. You might not be diagnosed with it until you have a routine blood test.
Treatment of Leukemia
- Watchful waiting
- Chemotherapy
- Targeted therapy
- Biological therapy
- Radiation therapy
- Stem cell transplant
If your spleen is enlarged your doctor may suggest surgery to remove it. Sometimes a combination of these treatment is used.