What genetic mutations are commonly found in Leukemia

Common Genetic Mutations in Leukemia

Leukemia is actually a group of blood cancers, and the genetic mutations found depend on which type you have. Let me break down the most common mutations by leukemia type:

Acute Myeloid Leukemia (AML)

According to the NCCN Guidelines for Patients: Acute Myeloid Leukemia, AML cells can have several types of genetic changes:

Types of genetic changes include:

• Deletions – when part of a chromosome or gene is missing (for example, del(5q))
• Insertions – when a new part of a chromosome or gene is added
• Inversions – when parts within a chromosome switch positions (such as inv(16) and inv(3))
• Point mutations – when part of a gene is changed
• Translocations and rearrangements – when parts switch between two chromosomes (for example, t(8;21) which creates the RUNX1::RUNX1T1 gene rearrangement)

Specific mutations doctors look for in AML:

• FLT3 mutations – a protein that can affect how aggressive the leukemia is
• TP53 mutations – related to tumor suppression
• NPM1 mutations – commonly found in AML

These genetic changes help your doctors determine your AML subtype, which guides treatment decisions and helps predict how your leukemia might respond to therapy.

Chronic Myeloid Leukemia (CML)

According to the NCCN Guidelines for Patients: Chronic Myeloid Leukemia, CML has one defining genetic hallmark:

The BCR::ABL1 gene and Philadelphia chromosome:

• CML is caused by a single, specific abnormal gene called BCR::ABL1
• This happens when a piece of chromosome 9 and a piece of chromosome 22 break off and trade places
• This creates a shortened chromosome 22 called the Philadelphia (Ph) chromosome
• Important: If you don't have the Ph chromosome or the BCR::ABL1 gene, you don't have CML
• This abnormal gene makes a protein that leads to uncontrolled blood cell growth

Why This Matters for Your Care

According to NCCN Guidelines, genetic and biomarker testing is used to:

• Learn more about your specific subtype of leukemia
• Target treatment – certain mutations respond to specific drugs
• Determine prognosis (the likely course your cancer will take)

Your doctors will test your leukemia cells using methods like:

• Karyotype – a picture of your chromosomes
• FISH (Fluorescence in situ hybridization) – uses special dyes to find small changes
• NGS (Next-generation sequencing) – looks at genes in detailed ways to find mutations other methods might miss
• PCR (Polymerase chain reaction) – very sensitive test that can find 1 abnormal cell among more than 100,000 normal cells

Questions to Ask Your Care Team

1. What specific genetic mutations or chromosomal changes were found in my leukemia cells?
2. What do these mutations mean for my treatment options?
3. How will these mutations affect my prognosis?
4. Are there targeted therapies available for my specific mutations?
5. Will my mutations be monitored during and after treatment?

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This information is for educational purposes only. Always consult your healthcare team for personalized medical advice and decisions.