How genetics play a role in gynaecological cancers

Gynaecological cancers, including cancers of the ovaries, womb, cervix, vulva and vagina, are shaped by a mix of environmental, lifestyle and genetic factors. Among these, genetics plays an important part in the risk of certain gynaecological cancers. Understanding how genetics affects your risk can help with early detection and prevention, and can help you and your family make informed choices.

How do genes affect cancer risk?

Genes carry the instructions our cells need to grow, divide and repair themselves. Some genes act as a safety system, fixing damage to our DNA before it can cause problems. If one of these genes carries a harmful change, known as a mutation, that safety system works less well. Over time, damaged cells are more likely to build up and become cancer. Some of these gene changes can be passed down through families.

BRCA1 and BRCA2: the best-known genetic link

One of the best-known genetic links is with changes in the BRCA1 and BRCA2 genes. These genes normally help to repair damaged DNA. When they carry a mutation, the body's ability to repair DNA is reduced, which leads to a higher risk of cancer, particularly ovarian cancer and breast cancer.

Women with a BRCA mutation have a significantly higher lifetime risk of developing ovarian cancer. For that reason, many choose to take extra steps, such as closer monitoring or risk-reducing surgery to remove the ovaries and fallopian tubes once they have completed their family.

Lynch syndrome

Another important genetic factor is Lynch syndrome, an inherited condition caused by changes in the mismatch repair (MMR) genes. Lynch syndrome greatly increases the risk of womb (endometrial) cancer and ovarian cancer, as well as bowel cancer. Women with Lynch syndrome are usually advised to have regular checks and may consider risk-reducing options.

Why your family history matters

Family history is one of the clearest signs of an inherited risk. If close relatives on either side of your family have had ovarian, womb, breast or bowel cancer, especially at a young age, you may have inherited a higher risk. It is worth writing down who was affected, which cancer they had and how old they were when it was diagnosed. That information helps your doctor judge whether genetics may be playing a part.

Genetic counselling and testing

Genetic counselling and testing can help to identify inherited risks and give you advice tailored to you. A genetic counsellor will talk through your family history, explain what a test can and cannot tell you, and help you think about what a result might mean for you and your relatives.

Advances in genetics mean many women can now find out whether they carry a BRCA or MMR gene change. Knowing this allows earlier action, such as more frequent monitoring, lifestyle changes or preventive surgery. Cancer Research UK explains how inherited cancer genes affect risk, and NICE sets out guidance on ovarian cancer risk and recognition.

Taking control of what you can change

Your genetics are beyond your control, but early detection is within reach. Whatever your family history, you can lower your overall risk by keeping to a healthy weight, staying active and not smoking. Go for your smear tests when invited, and see a doctor promptly about symptoms such as persistent bloating or unusual bleeding. Our post on ovarian cancer risk factors has more practical steps.

At Gynae Solution, we believe genetic awareness is an important part of looking after your gynaecological health. If you are worried about your family history, Mr Abu can talk through your risk and, where appropriate, arrange a referral for genetic counselling. Please get in touch to book a consultation.