Leukemia: Symptoms, Signs, Causes and Types

What is Leukemia?

Leukemia is a type of blood cancer that begins in the bone marrow - the soft tissue inside bones where blood cells are made. It occurs when the bone marrow starts producing abnormal white blood cells that grow uncontrollably. These cancerous cells crowd out healthy blood cells, affecting the body’s ability to fight infections, control bleeding and carry oxygen.

Leukemia can be acute (fast-growing) or chronic (slow-growing) and affects both children and adults. Understanding what leukemia is, its symptoms, causes and types helps in early recognition and timely treatment.

Common Signs and Symptoms of Leukemia

Leukemia symptoms vary depending on the type and progression. They often resemble common illnesses, making early diagnosis challenging.

General Leukemia Symptoms

• Persistent fatigue or weakness

• Frequent infections

• Fever or chills

• Unexplained weight loss

• Loss of appetite

• Swollen lymph nodes

• Easy bruising or bleeding

• Tiny red spots on the skin (petechiae)

• Bone or joint pain

• Night sweats

Signs of Leukemia Related to Low Red Blood Cells

• Pale skin

• Shortness of breath

• Dizziness

Signs of Leukemia Related to Bleeding Issues

• Nosebleeds

• Bleeding gums

• Heavy menstrual bleeding

Leukemia Causes and Risk Factors

The exact leukemia causes are not always known, but several factors increase the risk of developing the disease.

Major Leukemia Risk Factors

1. Genetic Mutations
   Certain DNA changes can trigger uncontrolled cell growth.

2. Family History
   Having a first-degree relative with leukemia increases risk.

3. Radiation Exposure
   High levels of radiation (e.g., cancer treatments, nuclear exposure).

4. Chemical Exposure
   Long-term exposure to benzene and other industrial chemicals.

5. Certain Blood Disorders
   Myelodysplastic syndromes (MDS) can progress to leukemia.

6. Smoking
   Increases the risk of acute myeloid leukemia (AML leukemia).

7. Weakened Immune System
   HIV/AIDS or immunosuppressive medications increase susceptibility.

Types of Leukemia

Leukemia is classified based on how fast it progresses and the type of blood cell affected.

1. Acute Leukemia

Acute leukemia progresses quickly and requires immediate treatment.

Acute Lymphoblastic Leukemia (ALL Leukemia)

• Common in children but can affect adults

• Affects lymphoid cells

• Symptoms include fatigue, bone pain, swollen lymph nodes

Acute Myeloid Leukemia (AML Leukemia)

• More common in adults

• Affects myeloid cells

• Can cause bleeding issues, infections, and anemia

2. Chronic Leukemia

Chronic leukemia develops slowly and may not cause symptoms initially.

Chronic Lymphocytic Leukemia (CLL Leukemia)

• Often affects older adults

• Symptoms may include swollen lymph nodes, fatigue, weight loss

Chronic Myeloid Leukemia (CML Leukemia)

• Associated with Philadelphia chromosome mutation

• Gradual onset; may cause tiredness, night sweats, and splenomegaly

How Leukemia is Diagnosed

Early detection plays a major role in successful treatment. A proper leukemia diagnosis typically involves:

1. Blood Tests

• Abnormal white blood cell counts

• Low red blood cells or platelets

2. Bone Marrow Biopsy

A sample from the hip bone confirms the presence of leukemia cells.

3. Imaging Tests

CT scan, MRI, or ultrasound to check for organ enlargement.

4. Genetic Tests

Identify chromosomal abnormalities linked to specific leukemia types.

Treatment Options for Leukemia

Treatment depends on the leukemia type, patient age, and overall health.

Common Treatment Methods

• Chemotherapy

• Targeted therapy

• Radiation therapy

• Immunotherapy

• Bone marrow or stem cell transplant

When to Seek Medical Attention

Contact a doctor if you experience:

• Persistent fatigue

• Frequent infections

• Unexplained bruising

• Prolonged fever or night sweats

• Enlarged lymph nodes