Is there already a cure for cancer?

Why there is no "one" cure

Cancer is the name for hundreds of different diseases. Bowel cancer, leukemia and skin cancer have very different causes, behaviors and treatments. Even two tumors in the same organ can carry different genetic changes and respond to different drugs. That is why there will never be a single drug that cures "cancer." What we have instead are ever-better treatments for each type.

How a cancer arises: the "hallmarks"

In 2000, scientists Douglas Hanahan and Robert Weinberg published one of the most cited papers in the history of medicine, called Hallmarks of Cancer. They organized everything that was known about carcinogenesis, the way a cancer arises, into six abilities a normal cell must acquire to become cancer:

• multiplying without being told to;
• ignoring the "brakes" that tell it to stop growing;
• escaping programmed cell death, which gets rid of faulty cells;
• dividing forever, without aging;
• building new blood vessels to feed itself;
• invading other tissues and spreading through the body.

With each update of the paper, the list grew, because science discovered new pathways by which cancer arises. In 2011, the additions were changes in how the cell uses energy, the ability to hide from the immune system, genetic instability and inflammation. In 2022, Hanahan added the cell's ability to "change identity," changes that switch genes on and off without altering the DNA, the role of the bacteria that live in our bodies, and the role of aging cells.

The most important point is that each cancer uses a different combination of these pathways. One tumor relies mostly on a growth signal, another on hiding from the immune system, another on hormones. That is why each cancer grows in a completely different way and calls for a different kind of treatment: surgery, radiation therapy, chemotherapy, hormone therapy, targeted therapy or immunotherapy, alone or in combination. A drug that works very well against one tumor may do nothing against another.

What "cure" means in oncology

In oncology, we speak of a cure when the disease has been treated and does not come back, and the person's life expectancy becomes similar to that of someone who never had cancer. Because some cells can stay hidden for a while, doctors usually wait for a few years of follow-up before using that word with confidence. Until then, you may hear terms such as "remission" or "no evidence of disease."

Many cancers are already curable

• When found early, most solid tumors, such as bowel, breast, cervical and skin cancers, can be cured, often with surgery alone.
• The most common childhood leukemia is cured in about 9 out of 10 children.
• Testicular cancer is cured in the vast majority of cases, even when it has already spread.
• Hodgkin lymphoma also has high cure rates.

Even when a cure is not possible, many cancers can be controlled for years, like a chronic disease, with good quality of life.

The progress is real

In the United States, where long-term data are available, cancer mortality has fallen steadily since 1991, which has already prevented about 4.8 million deaths. Today, 7 in 10 people are alive five years after diagnosis. And the most striking change has happened precisely in metastatic disease:

These gains came from less smoking, earlier diagnosis and new treatments, such as targeted therapies and immunotherapy.

What about the "hidden cure"? Do the math

The idea sometimes circulates that the cure already exists and is being hidden by drug companies or governments. There is no evidence of this, and economics alone shows why it makes no sense.

In 2024, the world spent about 252 billion dollars on cancer drugs alone, and spending is forecast to reach 441 billion in 2029. A company holding a monopoly on a cure for cancer would earn staggering sums. No company would pass that up.

Obesity shows what happens when a treatment that truly works comes along. With drugs in the same family as Ozempic and Mounjaro, Eli Lilly's sales rose from 28 billion dollars in 2021 to more than 65 billion in 2025. Mounjaro and Zepbound, its diabetes and obesity drugs, together sold 36.5 billion dollars in a single year. Novo Nordisk, the maker of Ozempic, nearly tripled its sales since 2017. Nobody hid these drugs: the companies raced to sell them all over the world.

What's more, doctors, researchers, company owners and their families get cancer too. No one would hide the cure from their own mother.

Beware of miracle promises

"Natural" products, diets or therapies sold as "the cure doctors won't tell you about" turn up on the internet all the time. The danger is real: in an American study, people who replaced conventional treatment with alternative therapies alone had about two and a half times the risk of dying. Before using any product, talk to your care team. Many can be used alongside treatment, but never instead of it.

The most useful question is not "is there a cure for cancer?" but "what is the goal of my treatment?" Ask your oncologist. See also the guide to your first visit with the oncologist.

For information only. It does not replace an individual medical assessment.