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Living with Chronic myelogenous leukemia, BCR-ABL1 positive

A slow-growing cancer of the bone marrow that makes too many white blood cells, usually beginning after age 60.

Understanding Chronic myelogenous leukemia, BCR-ABL1 positive

Chronic myelogenous leukemia, BCR-ABL1 positive (chronic myeloid leukemia) is a slow-growing cancer of the blood-forming tissue in the bone marrow.

The marrow makes too many white blood cells. At first they work fairly normally, but later immature cells (blasts) build up and crowd out other blood cells, leading to anemia and low platelets. It usually begins after age 60. Many people develop an enlarged spleen. About half have no signs at first. GARD lists onset at a variety of ages.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Extreme tiredness (fatigue)
  • Fever
  • Weight loss
  • Enlarged spleen, with a feeling of fullness
  • Loss of appetite
  • High white blood cell counts

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include blood and bone marrow specialists and cancer specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    Aplastic Anemia and MDS International Foundation, Alex's Lemonade Stand Foundation and National CML Society may keep lists of experts for this condition.

Care & treatment

Care team
Blood and bone marrow specialists (hematologists); Cancer specialists (oncologists)
Expert care
Expert lists: Aplastic Anemia and MDS International Foundation, Alex's Lemonade Stand Foundation, National CML Society
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Aplastic Anemia and MDS International Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
What phase of CML do I have?
How will my blood counts be monitored?
Which specialists should be on my care team?

Quick facts

Symptoms usually starta variety of ages

GARD doesn't describe a cause for this condition beyond the name, which refers to the BCR-ABL1 change.

Blood

Also known as: bcr-abl positive chronic myelogenous leukaemia; bcr-abl positive chronic myelogenous leukemia; cgl - chronic granulocytic leukemia; chronic granulocytic leukaemia; chronic granulocytic leukemia; chronic myelocytic leukaemia

Patient organizations

Source: NIH GARD · Chronic myelogenous leukemia, BCR-ABL1 positiveGARD ID 6105 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Chronic myelogenous leukemia, BCR-ABL1 positive.

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