Chronic leukemia (CML and CLL): diagnosis, monitoring and treatment
Blood tumors develop differently. Some progress rapidly, while others progress for years with virtually no symptoms. The second group includes chronic leukemia.
Let's explore the differences between chronic myeloid leukemia and chronic lymphocytic leukemia, how chronic leukemia is diagnosed, and the benefits of seeing a hematologist-oncologist.
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What is chronic leukemia
This group includes blood tumors that disrupt cell maturation in the bone marrow. The changes are only noticeable through blood tests for a long time, and two types are most common: CML and CLL.
How do chronic leukemias differ from acute forms?
The main difference is speed. In acute leukemia, cells accumulate within weeks. Slower forms can take years. Therefore, accurate diagnosis and monitoring are more important than immediate treatment.
Chronic myeloid leukemia (CML)
This variant is based on a genetic defect—the Philadelphia chromosome and the BCR-ABL protein. Chronic myeloid leukemia is often discovered incidentally by high white blood cell counts in a blood test. In this case, targeted therapy is the leading treatment option.
Chronic lymphocytic leukemia (CLL)
Another variant involves the accumulation of altered lymphocytes in the blood and lymph nodes. Chronic lymphocytic leukemia is more common in older patients and can remain stable for a long time.
To make the differences clearer, we'll summarize the key parameters in a table.
| Parameter | CML | CLL |
|---|---|---|
| Origin | Myeloid lineage of bone marrow | B lymphocytes |
| Target cells | Granulocytes, myeloid precursors | Mature lymphocytes |
| Symptoms | Weakness, weight loss, large spleen | Enlarged nodes, anemia, infections |
| Diagnosis | Philadelphia chromosome, PCR | Immunophenotyping, FISH |
| Treatment | Tyrosine kinase inhibitors | Observation, targeted drugs, chemoimmunotherapy |
| Observation | Molecular response every 3-6 months | Lymphocyte monitoring, ultrasound of nodes |
The table makes it clear why the approaches to the two diseases differ.
Symptoms of chronic leukemia
The presentation depends on the form and stage. Early symptoms may be asymptomatic, but as the disease progresses, signs of impaired hematopoiesis and organ enlargement appear.
Early signs of the disease
The initial symptoms are nonspecific and can easily be attributed to fatigue or age. The following complaints deserve attention:
- Unexplained weakness and fatigue
- Night sweating
- Low fever without a cold
- Heaviness in the left hypochondrium
- Frequent infections
No single symptom alone confirms the diagnosis, but their combination is a reason to have a blood test.
Symptoms of progression
As the process progresses, complaints become more noticeable. Weakness increases, weight loss occurs, lymph nodes enlarge, and in the myeloid variant, the spleen also enlarges; anemia and bleeding are possible.
When to see a doctor
And here's when you need to schedule a consultation with a hematologist without delay:
- Persistent changes in blood tests
- Enlarged lymph nodes
- Increased fatigue and night sweats
- Unexplained weight loss
- Enlarged spleen
- The need to clarify or verify the diagnosis
The sooner a person sees an oncohematologist, the more accurate the treatment plan can be.
Diagnosis of chronic leukemia
The examination is structured in stages, from simple to complex. Typically, the diagnosis of chronic leukemia proceeds in the following sequence:
- Consultation with an oncologist-hematologist and examination
- Laboratory blood tests with cell count
- Cytogenetic study and molecular genetic analysis
- Bone marrow examination - puncture, if necessary, trephine biopsy
- Instrumental diagnostics: ultrasound, CT scan if indicated
This procedure helps to immediately collect the data needed to prescribe therapy.
Consultation with an oncologist-hematologist at "K+31"
The first step is a consultation and examination. The doctor evaluates the lymph nodes, liver, and spleen, and the consultation with the hematologist determines the further plan.
Laboratory blood tests
The basic method is a complete blood count and biochemical blood test. This shows the number of leukocytes and lymphocytes, and any deviations in blood counts are often the first sign of trouble.
Molecular genetic diagnostics
To clarify the nature of the tumor, genetic testing is used: for myeloid leukemia, BCR-ABL is tested using PCR, and for lymphocytic leukemia, markers are assessed using immunophenotyping. Molecular diagnostics confirm the diagnosis and help monitor the response.
Bone marrow examination
In some cases, bone marrow specimens are needed—this is obtained through a puncture or trephine biopsy. A bone marrow biopsy reveals the extent of the hematopoietic disorder.
Instrumental diagnostics
Visualization methods complement the picture. Ultrasound assesses the size of the spleen and liver, and a CT scan is prescribed if necessary.
"In practice, we often see chronic leukemias detected incidentally—through a routine blood test. Therefore, timely diagnosis, molecular genetic analysis, and regular treatment monitoring are so important. Comprehensive support allows for timely adjustments to treatment strategy,"
— oncologist-hematologist.
General information
Treatment of chronic myeloid leukemia (CML)
The approach to the myeloid variant has changed significantly: targeted drugs have made the disease manageable for years. The mainstay of CML treatment is tyrosine kinase inhibitors.
Therapy selection
The regimen is selected individually, taking into account the stage, age, and tolerance. Targeted therapy is taken in tablets long-term, with the goal of achieving remission.
Monitoring the molecular response
During treatment, BCR-ABL levels are regularly measured to monitor effectiveness, or the molecular response. Disease monitoring is performed every 3-6 months.
Long-term monitoring
Even with a good outcome, monitoring is not discontinued. This type of treatment monitoring allows for early detection of diminishing effectiveness and the appropriate adjustment of the regimen.
Answers to frequently asked questions
We've compiled a list of frequently asked questions; the answers are general in nature and do not replace an in-person consultation with a hematologist.
What is chronic myeloid leukemia?
Does chronic lymphocytic leukemia always need to be treated?
What tests are needed for diagnosis?
Is it possible to keep the disease under control for a long time?
If there are changes in the analyzes or you want to double-check the finished conclusion, it is wise to see a specialist. Diagnosis of chronic leukemia and further treatment of chronic leukemia are built into a single route - from the first appointment to long-term observation.
Sign up for a consultation with an oncologist-hematologist, and we will figure out the situation together.
Category of Clinical Guidelines of the Ministry of Health of the Russian Federation — https://cr.minzdrav.gov.ru/
Portal of the All-Russian Public Organization "Russian Society of Oncohematologists" — https://oncohematology.ru/
Russian Society of Clinical Oncology (RUSSCO) — https://rosoncoweb.ru
National Medical Library PubMed (Russian-language materials and reviews on the topic) — https://pubmed.ncbi.nlm.nih.gov
Disease Directory on the Doctor's Consultant Portal — https://www.rosmedlib.ru
Encyclopedia and Reference Materials of the Russian Medical Society — https://www.rmj.ru
Federal State Budgetary Institution "National Medical Research Center of Hematology" of the Russian Ministry of Health — https://blood.ru
A large medical encyclopedia and specialized materials on hematology — https://www.mediasphera.ru
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Causes and risk factors
The exact cause is often unclear: it involves random genetic changes in bone marrow cells, not infection. However, there are circumstances that increase the risk of developing the disease.
Possible mechanisms of disease development
The underlying cause is a defect in a hematopoietic cell, which divides uncontrollably and passes the defect on to its offspring. In the myeloid variant, BCR-ABL plays a key role, while in the lymphocytic variant, changes in lymphocytes play a key role. Understanding this has enabled the development of antitumor therapy.
Factors that increase risk
There are few controllable factors, but it is important to list them:
The presence of a factor does not necessarily indicate the disease—it is merely a reason to pay closer attention to routine blood tests.