Chek2 Gene

We remind you that independent interpretation of the results is unacceptable, the information provided below is for reference purposes only.

The CHEK2 (Checkpoint Kinase 2) gene encodes a protein involved in DNA repair mechanisms and the regulation of cell division. It helps protect cells against the accumulation of genetic alterations and plays an important role in maintaining genome stability.

Certain pathogenic variants of the CHEK2 gene may cause an inherited predisposition to certain types of cancer. The association with an increased risk of breast cancer is the best documented, although some CHEK2 variants may also be associated with other types of tumors.

Genetic testing can identify the CHEK2 gene variants analyzed using the laboratory's testing method and may contribute to the assessment of hereditary cancer predisposition. The result should be interpreted in the context of personal and family history, clinical findings and, when necessary, as part of a medical genetics consultation.

Indications

• personal history of breast cancer, particularly when hereditary predisposition is suspected;
• multiple cases of breast cancer within the family;
• cancer occurring at a young age within the family;
• presence of several types of cancer within the same family;
• a pathogenic CHEK2 variant previously identified in a biological relative;
• genetic risk assessment as part of the investigation of hereditary cancer predisposition syndromes;
• recommendation by a geneticist, oncologist, or other medical specialist.

Procedure

A biological sample is collected according to the testing method used by the laboratory. DNA is isolated from the sample and analyzed to identify the CHEK2 genetic variants included in the test.

The result may indicate the presence or absence of the genetic variants investigated. The result should be interpreted taking into account the testing method and scope of the analysis, as well as the patient's clinical data and family history.

Limitations

A negative result does not completely exclude a hereditary predisposition to cancer, as cancer risk may be influenced by other CHEK2 variants, alterations in other genes, as well as personal, familial, and environmental factors.

The clinical significance and associated level of risk may vary depending on the CHEK2 variant identified. Genetic testing does not diagnose cancer and cannot determine with certainty whether or not an individual will develop cancer.

Contraindications

There are no specific contraindications to CHEK2 genetic testing. Any limitations related to sample collection depend on the type of biological sample used.

Advantages

• helps identify an inherited predisposition to certain types of cancer;
• may provide additional information for individual cancer risk assessment;
• may contribute to the development of a personalized medical surveillance strategy;
• the result may also be relevant to the biological relatives of the person tested;
• genetic testing is generally performed only once in a lifetime, as inherited genetic information does not change.

Sources:

https://www.ncbi.nlm.nih.gov/books/NBK560712/
https://www.cdc.gov/genomics-and-health/about/genetic-testing.html
http://en.wikipedia.org/wiki/Genetic_analysis
https://my.clevelandclinic.org/health/diagnostics/23065-dna-test--genetic-testing
https://www.illumina.com/science/education/genetic-analysis.html
https://medlineplus.gov/genetics/understanding/testing/genetictesting/
https://www.mayoclinic.org/tests-procedures/genetic-testing/about/pac-20384827

IMPORTANT!

It is crucial to remember that the information provided in this section is not intended for self-diagnosis or self-treatment. If you experience any symptoms or a flare-up of a condition, it is essential to consult a healthcare professional for diagnostic testing and treatment. Only a qualified specialist can provide an accurate diagnosis and determine the appropriate course of treatment. To obtain the most accurate and consistent evaluation of test results, it is recommended to have them performed at the same laboratory. This is because different laboratories may use varying methods and units of measurement for similar tests.