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Genetics  (Expert Forum)
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breast and thyroid cancer
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AccessDNA
Welcome to the Genetics Forum! Questions in the Genetics Forum are being answered by genetic experts from AccessDNA. This forum is for questions and support regarding a person’s predisposition to a variety of medical conditions such as Ashkenazi Jewish Diseases, Bleeding Disorders, Blood Clotting Disorders, Cancer Genetics and Hereditary Cancer Syndromes, Chromosome Abnormalities, Congenital Birth Defects, Cystic Fibrosis, Family History, Fragile X Syndrome, Infertility, Newborn Screening, Rare Genetic Disorders, Prenatal Screening and Testing. This forum is for questions and support regarding a person’s predisposition to a variety of medical conditions such as Alzheimer’s Disease, Blood-clotting Disorders, Breast Cancer, Cystic Fibrosis, Diabetes, Marfan Syndrome, Ehlers-Danlos Syndrome, etc.

breast and thyroid cancer

by monica148, Aug 21, 2009 02:43PM
I am a 61 year old female with breast and thyroid cancer.  My older sister was diagnosed with breast cancer at the age of 61.  We also have two younger sisters, and want to know if they should be genetically tested for the breast cancer genes.  None of us have been tested yet.  

Is there also a genetic link between breast and thyroid cancer?

Thank you

by Jordanna Joaquina, MS, CGC, Aug 26, 2009 04:03PM
To: monica148
We recommend that you and your family (including your non-affected sisters) meet with cancer genetics for evaluation. A cancer genetic counselor can review the benefits and limitations of genetic testing for the cancer-predisposing syndromes applicable to your specific situation (if any).

Breast cancer and some types of thyroid cancer are associated with a hereditary cancer syndrome called Cowden syndrome. Almost everyone with Cowden syndrome develops hamartomas. Hamartomas are growths that are most commonly found on the skin and mucous membranes (such as the lining of the mouth and nose), but can also occur in the intestinal tract and other parts of the body. Abnormal growths on the skin and mucous membranes typically appear by a person's late twenties.
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