Overview
Acute Lymphoid Leukemia (ALL) is a type of cancer that affects the blood and bone marrow. It develops when the bone marrow produces too many immature white blood cells called lymphoblasts. These abnormal cells grow rapidly and crowd out normal blood cells, making it hard for the body to function properly. ALL is the most common type of leukemia in children but can also affect adults. ALL accounts for less than 0.5 % of all cancers in the US.
Types of Acute Lymphoid Leukemia (ALL)
B-cell ALL- Â Here the B-cell lymphocytes are affected. B-cell lymphocytes produce antibodies to protect the body. This type of ALL accounts for three fourth of all ALL cases.
T-cell ALL-Â Here the T-cell lymphocytes are affected. T-cell lymphocytes kill infected cells and support other immune cells to protect the body.
NK-cell ALL- This is a rare variety. NK (natural killer white blood cells kills infected and cancerous cell)
Symptoms
The symptoms of ALL can develop quickly and may include:
Fatigue and weakness
Frequent infections
Fever
Easy bruising or bleeding, including nosebleeds and bleeding gums
Swollen lymph nodes in the neck, armpits, or groin
Bone or joint pain
Pale skin
Shortness of breath
Loss of appetite and weight loss
Night sweats
Causes
The exact cause of ALL is not fully understood, but it occurs when changes (mutations) happen in the DNA of bone marrow cells. These mutations lead to uncontrolled cell growth, forming too many lymphoblasts (abnormal and immature white blood cells ).
Risk Factors
Certain factors may increase the risk of developing ALL, including:
Age: More common in children, especially those under 5 years old.
Genetic disorders: Conditions such as Down syndrome increase the risk.
Radiation exposure: High levels of radiation, such as cancer treatments or nuclear accidents.
Chemical exposure: Exposure to certain chemicals like benzene.
Previous cancer treatment: Some chemotherapy drugs used for other cancers may increase the risk.
Weakened immune system: Due to conditions like HIV/AIDS or organ transplants.
Family history: A close relative with ALL may slightly increase risk.
Diagnosis
Doctors use several tests to diagnose ALL, including:
Blood tests: To check for abnormal white blood cells, low red blood cells, and low platelets.
Bone marrow biopsy: A sample of bone marrow is taken by a bone marrow aspiration needle from sternum or hip bone to confirm the presence of leukemia cells.
Lumbar puncture (spinal tap): Checks if cancer has spread to the brain or spinal cord.
Imaging tests: X-rays, CT scans, or MRIs to detect swollen lymph nodes or organ involvement
Genetic tests: To identify specific mutations that may affect treatment choices.
Treatment
Treatment for ALL depends on age, overall health, and specific characteristics of the leukemia cells. Common treatments include:
Chemotherapy: The main treatment, using powerful drugs to kill cancer cells. It may take several months and sometimes several years.
ALL chemotherapy consists of
a) Remission induction therapy- During this phase leukemia cells are destroyed as much as possible and to restore normal blood cell production. It usually takes four to six weeks and needs hospitalisation.
b) Consolidation therapy- After remission consolidation therapy is given for several months usually in hospital to destroy as many cancer cells as possible that still remain.
c) Maintenance therapy- long term therapy with lower dose usually for two to three years to prevent regrowth of leukemia cells.
d) Central nervous system directed therapy- Chemotherapy drugs may be directly injected into the spinal canal to prevent or treat any involvement in the central nervous system.
Targeted therapy: Uses drugs that specifically attack leukemia cells based on their genetic makeup.
Radiation therapy: High-energy radiation to destroy cancer cells, especially if they have spread to the brain or spinal cord.
Stem cell transplant: Replaces diseased bone marrow with healthy stem cells from a donor.
Immunotherapy: Helps the immune system recognize and destroy cancer cells.
Supportive care: Includes blood transfusions, antibiotics, and medications to manage symptoms and side effects.
Prognosis
The prognosis for ALL depends on several factors, including age, response to treatment, and specific genetic changes in the leukemia cells.
Children: The survival rate for children with ALL is high, with over 85% achieving long-term remission.
Adults: Prognosis is generally lower, but advances in treatment have improved survival rates.
Relapse: Some patients may experience a return of the disease, requiring additional treatment.
Coping and Support
Being diagnosed with ALL can be overwhelming, but there are ways to cope and find support:
Education: Learn about ALL and treatment options to make informed decisions.
Emotional support: Talk to family, friends, or a counselor to share feelings and concerns.
Support groups: Joining a leukemia support group can provide comfort and shared experiences.
Healthy lifestyle: Eating well, staying active when possible, and getting enough rest can help manage symptoms.
Follow-up care: Regular doctor visits and tests ensure early detection of any complications or relapse.
Living with ALL can be challenging, but with the right treatment and support, many people go on to lead fulfilling lives.
