10 Myths About Cancer

10 Myths About Cancer

February is Cancer Prevention Month — a time to raise awareness, bust myths, and encourage proactive screening. Cancer is one of the most misunderstood diseases, and misinformation can prevent people from seeking timely help. Here are 10 of the most common cancer myths — and the facts behind them.

Myth 1: Cancer Is Always Fatal

Fact: Many cancers are highly treatable, especially when detected early. Survival rates for cancers like breast, colorectal, and thyroid cancer have improved dramatically with advances in screening and treatment.

Myth 2: Cancer Is Purely Genetic — If It Runs in Your Family, You’ll Get It

Fact: Only 5–10% of cancers are caused by inherited gene mutations. The vast majority are caused by a combination of genetic predisposition and environmental/lifestyle factors. Having a family history increases risk but does not guarantee you will develop cancer.

Myth 3: If You Don’t Have a Family History, You’re Safe

Fact: Most people who develop cancer have no family history of the disease. Lifestyle factors like smoking, diet, obesity, and sun exposure are major contributors to cancer risk.

Myth 4: Cancer Is Contagious

Fact: Cancer itself is not contagious. However, some viruses that can cause cancer (like HPV and Hepatitis B) are transmissible — which is why vaccination against these viruses is an important cancer prevention strategy.

Myth 5: Sugar Feeds Cancer

Fact: All cells — including cancer cells — use glucose for energy. But eating sugar does not directly cause cancer to grow faster. However, a high-sugar diet can contribute to obesity, which is a known cancer risk factor.

Myth 6: Superfoods Can Prevent Cancer

Fact: No single food can prevent cancer. A balanced diet rich in fruits, vegetables, whole grains, and lean proteins — combined with a healthy lifestyle — is the best dietary approach to reducing cancer risk.

Myth 7: Mobile Phones Cause Cancer

Fact: There is currently no conclusive scientific evidence that mobile phone use causes cancer. Mobile phones emit non-ionising radiation, which does not damage DNA in the way that ionising radiation (like X-rays) does.

Myth 8: Biopsies Cause Cancer to Spread

Fact: Biopsies are safe and essential for accurate cancer diagnosis. The risk of cancer spreading due to a biopsy is extremely low and is far outweighed by the benefit of accurate diagnosis.

Myth 9: Positive Thinking Can Cure Cancer

Fact: A positive attitude can improve quality of life and help patients cope with treatment, but it cannot cure cancer. Cancer requires medical treatment — surgery, chemotherapy, radiation, immunotherapy, or targeted therapy.

Myth 10: Genetic Testing Is Only for People with a Family History of Cancer

Fact: Genetic testing for cancer risk is valuable for anyone who wants to understand their predisposition — not just those with a family history. Many people with hereditary cancer gene mutations have no known family history of the disease.