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Understanding Cancer: Causes and Differences in Risk

Cancer is a complex and often daunting topic, especially since it affects so many people around the globe. A common question that arises is: why do some people get cancer while others do not? To tackle this, we need to dive into the biology of cancer, the role of genetic and environmental factors, and the lifestyle choices that influence cancer risk.

What is Cancer?

At its core, cancer is the result of cells that grow uncontrollably and spread beyond their usual boundaries, which can then invade adjoining parts of the body or spread to other organs. This process, called metastasis, is what makes cancer so serious.

The body is made up of trillions of cells, which have a strictly regulated cell cycle that controls their growth, maturity, division, and death. Cancer begins when there is a breakdown in these regulatory systems, leading to unchecked growth and division.

Genetic Factors

Genetics play a critical role in the risk of developing certain types of cancer. Some people inherit damaged DNA (known as mutations) from their parents, which increases their risk significantly. Well-known examples include mutations in the BRCA1 and BRCA2 genes, which increase the risk of breast and ovarian cancers.

It's important to note that having a genetic predisposition does not guarantee that you will get cancer; it simply elevates the risk compared to individuals without these genetic changes.

Environmental and Lifestyle Factors

While genetics can load the gun, environment and lifestyle often pull the trigger. Lifestyle choices and environmental exposures can influence the development of cancer in significant ways. Here are several key factors:

• Smoking: Tobacco use is the single largest preventable cause of cancer worldwide. It can cause not only lung cancer but also a variety of other types including throat, mouth, and oesophageal cancer.
• Diet: What you eat can influence your risk of cancer. Diets high in red and processed meats have been linked to an increased risk of colorectal cancer, while diets high in fruits and vegetables may reduce the risk of several types of cancer.
• Physical activity: Regular physical activity is believed to lower the risk of cancers like breast and colon cancer.
• Alcohol: Excessive alcohol consumption is linked to an increased risk of cancers such as liver, breast, and oesophageal cancer.
• Environmental pollutants: Exposure to various chemicals and pollutants like asbestos, benzene, and some pesticides can elevate cancer risk.

Age as a Factor

Age is also a significant factor in cancer development. Most cancers occur in people aged 65 or older due to the longer exposure time to various risks and the natural weakening of our body's protective mechanisms as we age.

Real-Life Impact on Teens

As a teenager, you might feel very distant from the threat of cancer. However, understanding the risk factors from an early age can help you adopt a healthier lifestyle that can significantly decrease your risks later in life. Having open conversations about family histories of cancer can also prepare you for better preventative approaches.

Practical Strategies for Teens

Here are some practical steps you can take now to reduce your risk:

• Educate Yourself: Learning about cancer's causes, risks, and prevention can empower you to make informed decisions.
• Maintain a Healthy Diet: Focus on a balanced diet rich in fruits, vegetables, whole grains, and lean proteins. Reducing processed and red meat intake can also help lower risk.
• Exercise Regularly: Aim for at least 150 minutes of moderate aerobic activity or 75 minutes of vigorous activity each week.
• Avoid Tobacco and Limit Alcohol: Never start smoking and keep alcohol intake to minimal levels.
• Sun Protection: Protect your skin from harmful UV rays by using sunscreen, seeking shade, and wearing protective clothing.

Lastly, participating in regular medical check-ups and screenings as recommended can catch potential issues early, improving the likelihood of success in treatments.

Conclusion

The question of why some people get cancer and others don't doesn't have a straightforward answer. Everyone has some degree of risk, but through genetic factors, lifestyle choices, and environmental influences, the risks vary significantly. By taking proactive steps towards a healthier lifestyle and staying informed, you can help manage your own risk and advocate for the health of others around you.

How are you feeling?

It is really important that when we need help, we feel able to ask for it. This could be speaking to a parent, a close friend, a teacher or someone else you trust. Sometimes it can be really hard to share our feelings with other people but if we are feeling low or don't know where to turn, sharing with others is really important. Teachers will always take you seriously and listen to your problems in confidence if you approach them for help. Likewise, parents, siblings or friends will help you if you reach out to them.

If you feel like you can't speak to anyone you know, there are people and organisations that can help support you:

• Childline - Call them on 0800 1111 any time of the day or night, every day of the week
• NSPCC - Call them on 0808 800 5000 between 10am and 4pm Monday to Friday or email them on help@NSPCC.org.uk
• The Samaritans – Call them on 116 123 any time of the day or night, every day of the week
• SANE – Call 0300 304 7000 for support (4:30pm - 10:30pm every day)
• Mind – Call 0300 123 3393 (9:00am - 6:00pm Monday to Friday)

*Sometimes we will use real life examples in our articles to aid understanding. When we do, names and ages will be changed.