Cancer is not inevitable. Delay is.
Each year, millions of people receive a cancer diagnosis that science suggests need not have happened — not because medicine failed them in the moment of treatment, but because the systems meant to prevent and detect the disease failed them long before. A landmark study in Nature Medicine, backed by the World Health Organisation, has confirmed that more than one-third of the world's 18.7 million new cancer cases in 2022 were attributable to preventable causes: tobacco, alcohol, and infection chief among them. In India, where these same forces operate against a backdrop of fragmented infrastructure and underused screening, the gap between what medicine knows and what society does remains one of the quietest public health crises of our time. The suffering is real, the knowledge is available, and the distance between them is, at its core, a failure of collective will.
- Over 7 million cancer cases in a single year were preventable — not by miracle drugs, but by lifestyle changes and public health measures already within reach.
- India faces a compounding crisis: tobacco, alcohol, and chronic infections drive a rising cancer burden, while vaccines and screening tools that could interrupt this pattern go largely unused.
- Patients are arriving at oncology clinics with advanced, treatment-resistant disease — not because cancer struck without warning, but because the systems meant to catch early signals were never properly activated.
- Blood-based multi-cancer detection tests offer a promising horizon, but experts caution they are supplements to, not substitutes for, proven screening methods like mammography, Pap smears, and colonoscopies.
- The medical community is calling for a decisive pivot: away from reactive, late-stage treatment and toward aggressive prevention, expanded screening adoption, and policy frameworks that close the gap between evidence and action.
For many people, a cancer diagnosis still feels like fate — an ambush from within, governed by genetics or chance. But a major study published in Nature Medicine, led by researchers at the International Agency for Research on Cancer under the WHO, challenges that fatalism with uncomfortable precision. Of the 18.7 million new cancer cases recorded worldwide in 2022, roughly 7.1 million were traceable to preventable causes. Tobacco alone accounts for 15% of those cases, infections for 10%, and alcohol for 3%. The crisis, the data suggests, is not merely medical — it is behavioral and political.
India reflects this global picture, but with added complexity. The same preventable factors dominate, yet the infrastructure to confront them remains uneven and underfunded. Tobacco drives epidemics of lung, oral, and head-and-neck cancers. Alcohol and diet fuel rising rates of liver and gastrointestinal disease. HPV and hepatitis persist despite the availability of effective vaccines. For Dr. Nitesh Rohatgi, Principal Director of Medical Oncology at Fortis in Gurgaon, these are not random medical failures — they are the predictable outcomes of policy inaction and social normalization of risk.
After two decades in clinical practice, Dr. Rohatgi has reached a painful conclusion: a large share of the cancers he treats daily were never inevitable. The tools to prevent or detect them early — mammography, Pap smears, low-dose CT scans, colonoscopies, oral examinations — are proven and available. Yet their adoption across India remains critically low. What troubles him most is not the biology of the disease, but the timing of its discovery. Patients arrive when cancer has already spread, when options are few and costs are crushing. Cancer, he insists, is not silent — we have simply not built the systems to hear it early enough.
The way forward, in his view, demands a fundamental reorientation: from reactive treatment to proactive prevention, from awareness campaigns to actual screening uptake, and from cautious curiosity about new diagnostic tools to their responsible integration alongside established methods. The message is unsparing — cancer is not inevitable, but delay, increasingly, is.
A cancer diagnosis still carries the weight of inevitability in the minds of many—a sudden, cruel strike of bad luck or faulty genes. But the science tells a different story, one that is far more unsettling because it suggests that much of this suffering was avoidable.
A major study published in Nature Medicine, led by researchers at the International Agency for Research on Cancer under the World Health Organisation, found that more than one-third of all cancer cases stem from preventable causes. In 2022 alone, roughly 7.1 million of the world's 18.7 million new cancer diagnoses could have been prevented through lifestyle changes and public health measures. Tobacco accounts for 15% of these cases, infections for 10%, and alcohol for 3%. The numbers are staggering not because they are surprising, but because they point to a crisis that is largely self-inflicted—and therefore, theoretically, within our power to stop.
India mirrors this global pattern, but with a twist. The same preventable factors dominate the cancer landscape here, yet the infrastructure to address them remains fragmented. Tobacco continues to fuel an epidemic of lung, oral, and head-and-neck cancers. Alcohol and lifestyle choices drive rising rates of liver and gastrointestinal malignancies. Chronic infections like HPV and hepatitis persist despite the existence of effective vaccines. For Dr. Nitesh Rohatgi, Principal Director of Medical Oncology at Fortis in Gurgaon, these are not merely medical failures—they represent a predictable consequence of policy failure and social acceptance.
After two decades of clinical practice, Dr. Rohatgi has arrived at a sobering realization: a large proportion of the cancers he sees every day never needed to happen. The tragedy is not that we lack the tools to prevent or catch cancer early. Mammography for breast cancer, Pap smears for cervical cancer, oral examinations for tobacco users, low-dose CT scans for chronic smokers, and colonoscopies for those over 50 have all been proven to work. Yet across India, adoption of these life-saving methods remains dismally low. Vaccines that could prevent infection-driven cancers sit largely unused. The gap between what we know works and what we actually do remains vast and damning.
What troubles Dr. Rohatgi most is not the aggressiveness of the cancers themselves, but the lateness of their discovery. Patients arrive at his clinic when the disease has already spread, when treatment options narrow and costs explode. This is not because cancer is silent, he emphasizes—it is because we are not listening early enough. The disease gives warnings, but the systems meant to catch those warnings have failed. In high-risk populations, emerging blood-based tests that can detect multiple cancers show promise, though they remain adjuncts to, not replacements for, established screening methods.
The path forward requires a fundamental shift in approach. Rather than waiting for cancer to announce itself through symptoms, the medical community must move toward aggressive prevention, wider adoption of proven screening tools, and the responsible integration of new diagnostic technologies. Dr. Rohatgi's message is direct: if we are serious about reducing deaths, we must stop reacting late. Cancer is not inevitable. Delay is.
Citas Notables
A large proportion of the cancers I see every day never needed to happen.— Dr. Nitesh Rohatgi, Principal Director of Medical Oncology at Fortis
What breaks me most as an oncologist is not aggressive cancer—it is late diagnosis.— Dr. Nitesh Rohatgi
La Conversación del Hearth Otra perspectiva de la historia
Why does India specifically struggle more with this problem than other countries with similar resources?
It's not just resources—it's infrastructure and social acceptance. Tobacco use is deeply embedded in Indian culture and economics. Screening programs require sustained funding, trained personnel, and public trust. Many people don't seek screening because they don't see cancer as preventable, or because they fear the diagnosis itself.
Dr. Rohatgi mentions that vaccines for HPV and hepatitis exist but remain unused. What's the barrier there?
Partly awareness, partly access. Vaccination programs require cold chains, trained administrators, and coordination across public health systems that are already stretched thin. There's also hesitation—some communities have cultural or religious concerns about certain vaccines.
The study says 38% of cancers are preventable. That's enormous. Why hasn't this triggered a national emergency response?
Because prevention is invisible. A screening program that catches cancer early doesn't produce the dramatic headlines that a new treatment does. And prevention requires sustained effort over years, while governments often chase quick wins. The human cost is real, but it's distributed across millions rather than concentrated in one crisis.
You mentioned blood-based multi-cancer tests as emerging tools. Are those a solution?
They're a piece of the puzzle, not the whole answer. They're still evolving, still imperfect. The real solution is getting people to use the screening tools we already know work—mammography, Pap smears, colonoscopies. Those are proven. The new tests might help catch what we miss, but they can't replace the fundamentals.
What would actually change things?
Policy change, primarily. Aggressive tobacco control. Vaccination campaigns with real funding and reach. Making screening accessible and free or cheap. And a cultural shift—getting people to see cancer as something they can influence, not just something that happens to them.