World Cancer Day 2026: Everything you need to know about types of cancers, causes, prevention, and treatment choices

Cancer isn’t always inevitable. From vaccines and early screening to personalised treatment, doctors explain how modern medicine is changing outcomes and saving lives. (Image: Pexels)

• Vaccines and screening can prevent or detect many cancers early
• Personalised cancer treatment uses tumour biology for precise therapies
• Lifestyle changes like quitting tobacco and healthy diet lower cancer risk

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Cancer is a disease that continues to stir deep fear, yet research shows it is not always inevitable. Vaccines, regular screening programmes, and timely, appropriate treatment can prevent several cancers or detect them early, when outcomes are far more favourable and lives can be saved.

Apart from prevention, advances in medical science are reshaping how cancer is treated. Dr Ashok Kumar Vaid, Oncologist, Chairman Medanta Cancer Institute, says, “By understanding the biology of each tumour, it is now possible to personalise therapy, improve effectiveness while reducing unnecessary side effects, and offer patient care that feels more precise, hopeful, and humane.”

Common cancers like breast, lung, cervical, colorectal and oral, continue to dominate diagnoses, largely shaped by lifestyle, infections, and ageing populations. HPV vaccination, informs Dr Vaid, cuts cervical cancer risk, while screening reduces mortality across breast and colorectal cancers. “Molecular studies show patients with lung cancers carrying EGFR or ALK mutations live longer on targeted drugs than on conventional chemotherapy. Breast cancer outcomes improve when treatment follows hormone receptor and HER2 status.” he adds.

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Additionally, molecular profiling has brought in a change where, instead of guessing, oncologists now read tumours like maps, identifying mutations, proteins, and immune markers. “This means fewer wasted treatments and more precise choices. It’s about matching the right drug to the right patient,” Dr Vaid explains, “and sparing them therapies that offer little benefit. Immunotherapy, once niche, now stands as a lifeline for selected patients.”

Dr Vaid shares some common cancers, their risks and prevention tips

• Breast cancer remains the most diagnosed malignancy among women, with risk rising through age, inherited genes, obesity, and prolonged hormonal exposure. This makes regular self-awareness, timely mammography, and open family history discussions vital for earlier detection and calmer decision-making.
• Lung cancer reveals the hazards of tobacco, pollution, and exposure. Still, quitting smoking at any stage lowers risk, while cleaner air policies, early imaging for high-risk groups, and honest conversations can steadily shift outcomes once considered inevitable.
• Cervical cancer is largely preventable, driven by persistent HPV infection, where vaccination, regular Pap testing, and community education protect younger generations, reduce stigma around screening, and turn a once-feared diagnosis into a manageable, often avoidable condition.

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• Colorectal cancer reflects modern living, with processed diets, inactivity, and genetics playing a role. Nevertheless, simple shifts towards fibre-rich foods, exercise, and scheduled colonoscopies after midlife can catch silent disease early, when treatment is simpler and survival markedly higher.
• Oral cancers continue to shadow tobacco and alcohol use, particularly in South Asia, reminding us that quitting poor habits, improving dental checks, and recognising early mouth changes can prevent aggressive disease and preserve speech, appearance, and everyday dignity.

FAQs on Cancer Prevention and Modern Treatment

Is cancer always inevitable?

No. While not all cancers can be prevented, many can be avoided or detected early through vaccination, regular screening, and timely medical care, which greatly improves survival.

Which vaccines help prevent cancer?

The HPV vaccine helps prevent cervical cancer, and the hepatitis B vaccine lowers the risk of liver cancer by preventing chronic viral infection.

Why is early cancer screening important?

Screening can detect cancer before symptoms appear, when treatment is more effective, less aggressive, and outcomes are significantly better.

What is personalised cancer treatment?

Personalised treatment uses molecular profiling to identify genetic mutations or markers in a tumour, allowing doctors to select therapies that target the cancer more precisely.

Can lifestyle choices influence cancer risk?

Yes. Quitting tobacco, limiting alcohol, maintaining a healthy weight, staying physically active, and eating a balanced diet can reduce the risk of several common cancers.

Disclaimer: This article, including health and fitness advice, only provides generic information. Don’t treat it as a substitute for qualified medical opinion. Always consult a specialist for specific health diagnosis.