What Is Blood Cancer?
Blood cancer can develop when genetic changes affect the way blood-forming or immune cells grow, divide and function.
Many blood cancers begin in the bone marrow, the soft tissue inside bones where blood cells are produced. As abnormal cells multiply, they may interfere with the production of healthy blood cells.
The three commonly recognized categories of blood cancer are:
- Leukemia
- Lymphoma
- Multiple myeloma
Each category includes different subtypes, so diagnosis and treatment depend on the specific disease.
What Are the Main Types of Blood Cancer?
1. Leukemia
Leukemia is a cancer of blood-forming tissues, including the bone marrow. It commonly affects white blood cells, which may become abnormal and fail to function normally.
2. Lymphoma
Lymphoma develops in lymphocytes, a type of white blood cell involved in the immune system. Abnormal lymphocytes may collect in lymph nodes or other tissues.
The two broad categories are:
- Hodgkin lymphoma
- Non-Hodgkin lymphoma
3. Multiple Myeloma
Multiple myeloma is a blood cancer that develops in plasma cells. These cells normally produce antibodies that support the immune system.
In multiple myeloma, abnormal plasma cells can accumulate in the bone marrow and affect healthy blood cell production. The condition may also be associated with bone problems and kidney-related complications.
What Are the Symptoms of Blood Cancer?
Symptoms can differ depending on the type of blood cancer and how it affects the body. Some people may experience several symptoms, while others may have few or no noticeable symptoms in the early stages.
Possible symptoms include:
- Persistent tiredness or weakness
- Shortness of breath
- Fever or chills
- Unexplained weight loss
- Swollen lymph nodes
- Bone pain or tenderness
- Unusual bruising or bleeding
- Excessive sweating, particularly at night
- Enlargement of the liver or spleen
These symptoms can also occur with conditions other than blood cancer. Having one or more of these symptoms does not independently confirm a cancer diagnosis.
If symptoms persist or cause concern, consult a medical professional for appropriate evaluation.
When Should You Consult a Cancer Specialist?
You should seek medical advice if you experience persistent, unexplained or concerning symptoms.
A cancer specialist may review your symptoms, medical history and physical examination findings before recommending further investigations. Depending on the suspected condition, a hematologist or oncologist may be involved in your care.
Medical assessment can help identify possible causes of symptoms and determine whether additional testing is required.
What Causes Blood Cancer?
The exact causes of blood cancer vary according to the specific type.
Blood cancers can develop when genetic changes affect the normal behaviour of blood-forming or immune cells. These changes may interfere with the usual control of cell growth and division.
As abnormal cells increase, they may interfere with the production of healthy blood cells in the bone marrow. However, the precise reason an individual develops blood cancer is not always known.
Risk Factors Associated With Blood Cancer
Certain factors may increase the risk of developing some types of blood cancer. These can include:
- Increasing age
- Smoking or exposure to tobacco smoke
- Exposure to certain chemicals, including benzene and formaldehyde
- Previous chemotherapy or radiation treatment
- Certain inherited or acquired medical conditions
- A family history of particular blood cancers
Risk factors differ between blood cancer types. Having a risk factor does not mean that a person will definitely develop cancer, and some people may develop blood cancer without an identifiable risk factor.
How Is Blood Cancer Diagnosed?
The diagnostic process depends on the suspected type of blood cancer. A cancer specialist may begin by reviewing the patient's symptoms and medical history and conducting a physical examination.
Additional investigations may include the following.
1. Blood Tests
Blood tests can assess blood cell counts and identify certain abnormalities.
A complete blood count (CBC) measures red blood cells, white blood cells and platelets. Other blood tests may assess blood chemistry, proteins or other findings relevant to the suspected condition.
Blood tests can provide important information, but additional testing may be needed to establish the specific diagnosis.
2. Bone Marrow Examination
A bone marrow aspiration or biopsy may be recommended for certain blood cancers.
During these procedures, a sample of bone marrow is collected and examined in a laboratory. The sample can help identify abnormal cells and provide information relevant to diagnosis and treatment planning.
3. Imaging Tests
Imaging tests may help doctors examine specific areas of the body and assess signs of disease.
Depending on the suspected condition, investigations may include:
- CT scans
- MRI scans
- PET scans
The choice of imaging depends on the patient's symptoms, clinical findings and suspected diagnosis.
4. Lymph Node or Tissue Biopsy
A biopsy involves collecting a sample of tissue for laboratory examination.
For suspected lymphoma, a lymph node or another tissue sample may be examined to identify abnormal cells and help establish the specific type of lymphoma.
The investigations required vary according to the suspected blood cancer.
How Is Blood Cancer Treated?
Treatment is selected according to the type and subtype of blood cancer, the patient's medical circumstances and relevant test results.
Treatment options may include the following.
1. Chemotherapy
Chemotherapy uses medicines to act against cancer cells. It may be used for several types of blood cancer.
The medicines, treatment schedule and combination with other treatments depend on the specific diagnosis.
2. Radiation Therapy
Radiation therapy uses radiation to damage abnormal cells. It may be considered for selected blood cancers or particular treatment purposes.
Its use depends on the type and extent of the disease.
3. Immunotherapy
Immunotherapy includes treatments designed to help the immune system recognize or attack cancer cells.
Certain approaches, including monoclonal antibodies and CAR T-cell therapy, may be used for selected blood cancers. Their suitability depends on the diagnosis and the medical team's assessment.
4. Targeted Therapy
Targeted therapy uses medicines that act on specific characteristics of cancer cells.
These treatments may be considered when testing identifies features that can be targeted. The choice depends on the type of blood cancer and the patient's test results.
5. Stem Cell or Bone Marrow Transplant
Some patients may be considered for a stem cell or bone marrow transplant.
Depending on the treatment approach, stem cells may be collected from the patient or obtained from a suitable donor. Transplantation is not appropriate for every patient, and eligibility depends on factors such as the cancer type, treatment plan and overall health.
A cancer specialist determines the most appropriate treatment approach after reviewing the patient's diagnosis and clinical information.
Can Blood Cancer Be Prevented?
Not all blood cancers can be prevented. Some risk factors are associated with particular types of blood cancer, but a person may develop the disease without a known risk factor.
People concerned about their individual risk should discuss their medical history and concerns with a qualified cancer specialist.
Frequently Asked Questions
What are the three main types of blood cancer?
The three commonly recognized categories are leukemia, lymphoma and multiple myeloma. Each category includes different subtypes and affects different cells or tissues.
What are some common symptoms of blood cancer?
Possible symptoms include persistent tiredness, frequent infections, fever, unexplained bruising or bleeding, swollen lymph nodes and bone pain. These symptoms may also be associated with other medical conditions.
Can a blood test confirm blood cancer?
Blood tests can identify unusual blood cell counts and other findings that may require further investigation. Depending on the suspected disease, additional testing, such as a bone marrow examination or biopsy, may be necessary.
Which specialist treats blood cancer?
A hematologist specializes in conditions affecting blood and blood-forming tissues, while an oncologist specializes in cancer care. The specialists involved depend on the patient's diagnosis and treatment needs.
Is blood cancer treatment the same for every patient?
No. Treatment depends on the type and subtype of blood cancer, relevant test results, the extent of the disease and the patient's overall health. A cancer specialist recommends treatment based on the individual diagnosis.
Conclusion
Blood cancer includes several diseases affecting blood cells, bone marrow or the lymphatic system. Leukemia, lymphoma and multiple myeloma are major categories, each with different characteristics and treatment requirements.
Symptoms such as persistent tiredness, frequent infections, unexplained bruising, unusual bleeding or swollen lymph nodes should be evaluated when they persist or cause concern. Depending on the suspected condition, diagnosis may involve blood tests, imaging, bone marrow examination or biopsy.
Treatment options vary and may include chemotherapy, radiation therapy, immunotherapy, targeted therapy or stem cell transplantation. The appropriate approach depends on the specific diagnosis and the patient's medical circumstances.
If you have concerning symptoms or questions about blood cancer, consult a qualified cancer specialist for appropriate medical guidance.
Medical Disclaimer: This article is intended for general educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Please consult a qualified cancer specialist for personalized medical guidance.