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Multiple primary cancers as a guide to heritability.

Cezary Cybulski1, Safia Nazarali, Steven A Narod

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Genetic testing identifies inherited cancer risks from gene mutations. It is recommended for individuals with multiple primary cancers, considering family history and cancer details.

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Area of Science:

  • Oncology
  • Genetics
  • Cancer Research

Background:

  • Approximately 100 genes are known to predispose individuals to cancer when mutated.
  • Hereditary cancer is characterized by a positive family history, early onset, and multiple primary cancers.
  • Multiple primary cancers can occur in the same or different sites, sometimes indicating specific cancer syndromes like breast ovarian cancer syndrome.

Purpose of the Study:

  • To outline the indications and considerations for genetic testing in individuals with hereditary cancer.
  • To emphasize the importance of a comprehensive pre-test evaluation for genetic counseling.

Main Methods:

  • Review of current practices in genetic testing for hereditary cancer predisposition.
  • Analysis of clinical features indicative of hereditary cancer syndromes.
  • Guidelines for genetic counseling and pre-test evaluation.

Main Results:

  • Genetic testing is available for many cancer predisposition genes, offered as single-gene or multi-gene panels.
  • Specific patterns of multiple primary cancers can suggest particular hereditary cancer syndromes.
  • A thorough review of cancer history, pathology, and family history is crucial before genetic testing.

Conclusions:

  • Genetic testing should be considered for individuals with multiple primary cancers under specific circumstances.
  • Comprehensive genetic counseling and evaluation are essential components of the pre-test process for hereditary cancer assessment.