What raises breast cancer risk without a BRCA mutation?

Question

Hi doctor,

I am 35 years old and recently underwent genetic testing due to a strong family history of breast cancer. The results did not identify any known cancer-related genetic mutations. However, my doctor mentioned that my risk of developing breast cancer may still be higher than that of the general population.

Could you please explain why a woman of my age, with no detected genetic mutation, might still have an elevated breast cancer risk?
Can factors such as family history, lifestyle influences, or currently unidentified genetic variations contribute to increased risk despite negative genetic test results?
Additionally, in a situation like this, would it be advisable to begin breast cancer screening earlier than the standard recommendations for the general population?

I would greatly appreciate your guidance regarding these concerns.

Thank you for your time and assistance.

Answer 1

Hi,

Welcome to icliniq.com

I hope you are doing well.

I completely understand your concern, especially given the strong history of breast cancer in your family. It is important to recognize that breast cancer can be associated with many different genetic factors. While more than a thousand genes may potentially play a role, the genes most commonly tested today are BRCA1 and BRCA2, as these are the ones most strongly linked to hereditary breast cancer.

However, our understanding of cancer genetics continues to evolve. It is possible that additional genes associated with hereditary breast cancer may be identified in the future, and some genetic factors may not yet be fully understood or routinely tested. This is one reason why a person may still be considered at increased risk despite having negative genetic test results.

Due to your significant family history, your doctor has recommended regular screening and thorough monitoring. This is a level of caution in order to identify any change at the earliest possible moment. Screening should not be perceived as something alarming, but rather as a proactive approach to preserving your health and offering reassurance.

Based on suggestions from your healthcare physician, if you are in your thirties with regular menstrual cycles, a yearly breast ultrasound may be the right screening choice for you. You can also do a monthly breast self-exam, which is an easy, important habit that will help you learn what normal breast tissue feels like so you will recognize any new changes quickly.

I wanted to know more about the thinking behind genetic testing and recommendations on continuous screening.

I hope this explanation was helpful and easy to understand.

If you have any other queries or concerns, please feel free to contact me.