What is a BRAF Genetic Test?
A BRAF Genetic Test looks for changes (mutations) in the BRAF gene, which provides instructions for making a protein involved in cell growth and division. Certain mutations, particularly the BRAF V600E mutation, can cause cells to grow uncontrollably, leading to the development and progression of cancer.
The test is commonly performed on tumor tissue after a cancer diagnosis to determine whether targeted therapies are likely to be effective. Identifying a BRAF mutation helps healthcare providers select personalized treatment options and improve treatment planning. Unlike inherited genetic tests, BRAF testing usually identifies acquired (somatic) mutations found only in cancer cells and is generally not used to assess inherited cancer risk.
How is the Test Performed?
Preparation
- Preparing for a BRAF Genetic Test depends on the type of sample being analysed.
- Fasting is usually not required.
- Inform your healthcare provider about your medical history and current cancer diagnosis.
- Follow any instructions regarding biopsy or blood sample collection.
- Discuss the purpose and possible outcomes of testing with your healthcare provider.
Collection
- The sample collected depends on the testing method.
- Tumor tissue obtained during a biopsy or surgery is most commonly used.
- In some cases, a blood sample is collected for liquid biopsy testing to detect circulating tumor DNA (ctDNA).
- The collection procedure varies depending on the sample type.
Lab Analysis
The sample is analyzed using specialized molecular techniques such as PCR or next-generation sequencing (NGS) to detect mutations in the BRAF gene. The results help determine whether targeted therapies may be effective and are interpreted together with the cancer type, stage, pathology findings, and other molecular test results.
What are the Symptoms that Prompt this Test?
A BRAF Genetic Test is not performed to diagnose symptoms directly. Instead, it is recommended after a cancer diagnosis or when a healthcare provider needs genetic information to guide treatment decisions.
Situations and Conditions That May Prompt This Test
Your healthcare provider may recommend a BRAF Genetic Test if you have:
- A newly diagnosed melanoma
- Colorectal cancer
- Non-small cell lung cancer (NSCLC)
- Thyroid cancer
- Hairy cell leukemia
- Certain brain tumors
- Advanced or metastatic cancer requiring targeted therapy
- Cancer that has returned after treatment
The results help determine whether targeted medicines that act on BRAF mutations may be appropriate.
What are the Normal Ranges for This Test?
A BRAF Genetic normal range does not have a numerical value because it detects mutations in the BRAF gene rather than measuring a substance in the blood.
Results are generally reported as:
- Negative: No clinically significant BRAF mutation was detected.
- Positive: A pathogenic BRAF mutation (such as BRAF V600E) was identified.
- Inconclusive: The sample could not be fully analyzed, or additional testing may be required.
A negative result does not rule out cancer, as many cancers develop without BRAF mutations
“The reference ranges vary depending on the laboratory and the methodology used. Individuals must consult their healthcare provider for correct interpretation of the results.”
What Happens if Test Results Show Abnormal Findings?
Abnormal BRAF Genetic Test results indicate the presence of a mutation in the BRAF gene.
Positive BRAF Mutation
A positive result may be associated with:
- Melanoma
- Colorectal cancer
- Papillary thyroid cancer
- Non-small cell lung cancer (NSCLC)
- Hairy cell leukemia
- Certain brain tumors
A positive result may also indicate that the patient is eligible for BRAF-targeted therapies, depending on the type and stage of cancer.
Negative Results
A negative result generally means that no clinically significant BRAF mutation was detected. However:
- Cancer may still be present.
- The cancer may be driven by mutations in other genes.
- Additional molecular testing may be recommended.
Inconclusive Results
Inconclusive results may occur if:
- The sample contains too few tumor cells.
- The DNA quality is insufficient for analysis.
- Repeat testing or another specimen is needed.
Depending on the results, your healthcare provider may recommend additional investigations such as KRAS Mutation Testing, EGFR Mutation Testing, ALK Gene Testing, TP53 Genetic Testing, or a comprehensive tumor genomic profiling panel.
Need a BRAF Genetic Test? Book your appointment today for accurate molecular testing and expert oncology laboratory support.
