Most blood cancers are usually diagnosed when the signs have already manifested and these are signs which can also be associated with other diseases. Therefore, the process of diagnosis of blood cancer is not an easy task and needs to follow a proper process.
The process of diagnosing the condition involves the use of advanced technology in addition to other procedures including physical and laboratory tests. These tests serve different purposes; some tests help in detecting any abnormality whereas others diagnose the actual type and genetic characteristics of the condition. Getting familiar with these tests helps the patient feel more enlightened about their condition.
Understanding Blood Cancer Diagnosis
The diagnosis of blood cancer is a systematic process, involving several steps that aim at detecting any abnormalities in the patient’s blood cells, bone marrow, and the lymphatic system.
Blood cancers are one of the rare diseases that cannot be diagnosed using only one test since they are detected through the use of pathological, laboratory, and molecular studies. It is not just about the diagnosis itself but also about the type, stage, and genetic characteristics of the disease.
When Do Doctors Suspect Blood Cancer?
Generally, doctors start looking for evidence of blood cancer if certain health indicators or symptoms appear suspicious to them. Such symptoms include
- Inexplicable tiredness
- Excessive bleeding
- Recurrent infections
- Abnormal blood test results
In most instances, such suspicion comes up when a person undergoes a routine blood test.
Medical History & Physical Examination
A diagnosis begins with a comprehensive medical history and physical exam. Doctors evaluate:
1. Complete Blood Count (CBC)
Complete Blood Count is usually done first, and this gives a detailed description of:
- Red Blood Cells- For oxygen transport.
- White Blood Cells- For defense against disease.
- Platelets- For clotting process.
However, high or low counts of any of the cells, especially white blood cells, indicate that further investigation should be needed.
2. Peripheral Blood Smear
Peripheral blood smear is a test where a specimen of blood is studied using a microscope. Through this test, the experts can examine:
- The structure of the blood cells.
- Immature or unusual cells.
- Any signs of leukemia or other disorders.
It provides a visual verification of any problems found in CBC.
3. Bone Marrow Aspiration and Biopsy
It is one of the most conclusive ways to detect blood cancer. This test entails the removal of tissue samples from the bone marrow, which is mostly done from the hip bone.
- Aspiration involves liquid marrow
- Biopsy involves solid bone marrow
These tests are used to determine the type and degree of cancer spread in the bone marrow.
4. Flow Cytometry
Flow Cytometry is one of the latest diagnostic methods that aid in studying individual cell features. Flow Cytometry is used for:
- Determining the cell markers
- Classification of leukemia and lymphoma
- Minimal residual disease detection
This diagnostic method is essential for diagnosis and treatment planning.
5. Cytogenetic and Genetic Testing
Current treatment for cancer requires genetic information. These include:
- Chromosome abnormality
- Mutations within genes that cause specific types of cancer
- Treatment targets
Such findings assist in the use of targeted therapies and the accuracy of diagnosis.
6. Imaging Tests
Despite the absence of a solid tumor formation in Blood Cancer cases, imaging techniques have a vital role to play in determining disease progression. The various imaging techniques include:
- Positron Emission Tomography Scan (PET Scan)
- Computed Tomography Scan (CT Scan)
- Magnetic Resonance Imaging Scan (MRI Scan)
7. Lymph Node Biopsy
In situations where lymphoma is suspected, a lymph node biopsy is carried out. Here, a small piece of tissue is removed and then analyzed under a microscope to:
- Determine the presence of cancer
- Detect the exact type
- Make informed treatment decisions
However, this process is very important in lymphoma diagnosis.
Why Early Diagnosis Matters?
Early diagnosis increases the probability of successful treatment immensely because early diagnosis of blood cancer means that patient have the following:
- Early treatment
- Positive results to treatment
- Fewer complications
- Higher chances of survival
Moreover, it helps reduce the level of aggressiveness of treatment, increasing the quality of life in some patients.
Conclusion
Blood cancer diagnosis entails a mixture of different approaches including physical examination, lab tests, and molecular methods. Every method has its own purpose and is aimed at forming a thorough picture of the condition. Due to the development of the technologies for the diagnosis of blood cancer, specialists nowadays have an opportunity to diagnose blood cancers much more accurately than in the past.
FAQs
1. How much time is required for diagnosis?
This usually takes one to two weeks depending upon the diagnostic tests involved.
2. Are imaging tests essential?
Imaging tests may not always be necessary but they prove to be helpful in some cases.
References
- Seo, I. H., & Lee, Y. J. (2022). Usefulness of complete blood count (CBC) to assess cardiovascular and metabolic diseases in clinical settings: a comprehensive literature review. Biomedicines, 10(11), 2697. Https://pmc.ncbi.nlm.nih.gov/articles/PMC9687310/
- Lynch, E. C. (1990). Peripheral blood smear. Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd Edition. Https://pubmed.ncbi.nlm.nih.gov/21250106/
- Malempati, S., Joshi, S., Lai, S., Braner, D. A., & Tegtmeyer, K. (2009). Bone marrow aspiration and biopsy. N Engl J Med, 361(15), 28. Https://www.researchgate.net/publication/26879255_Bone_Marrow_Aspiration_and_Biopsy
- McKinnon, K. M. (2018). Flow cytometry: an overview. Current protocols in immunology, 120(1), 5-1. Https://pubmed.ncbi.nlm.nih.gov/29512141/
- Ozkan, E., & Lacerda, M. P. (2020). Genetics, cytogenetic testing and conventional karyotype. Https://www.ncbi.nlm.nih.gov/books/NBK563293/
- Torabi, M., Aquino, S. L., & Harisinghani, M. G. (2004). Current concepts in lymph node imaging. Journal of nuclear medicine, 45(9), 1509-1518. Https://jnm.snmjournals.org/content/45/9/1509
