Frequently Asked Questions

The most common cancers worldwide are lung cancer, breast cancer, colorectal cancer, prostate cancer, stomach cancer, liver cancer, thyroid cancer, cervical cancer, bladder cancer, and non-Hodgkin lymphoma. Together, these cancers account for a large share of all new cancer diagnoses each year.

The percentages below are approximate global percentages of all new cancer cases, based on broad cancer categories. Exact rankings can vary by country, sex, age group, reporting system, and year.

Top 10 cancer types shown as a text chart:

Additional common cancers:

It is important to understand that “most common” does not always mean “most dangerous.” Some cancers, such as thyroid cancer and prostate cancer, are commonly diagnosed and often treatable, while others, such as pancreatic cancer and liver cancer, may be less common but more difficult to treat. Survival depends heavily on the cancer type, stage at diagnosis, tumor biology, access to care, and the patient’s overall health.

For practical health education, the most useful lesson from this chart is that a relatively small number of cancer types account for a large portion of the global cancer burden. Screening, early detection, smoking prevention, diet, exercise, infection prevention, vaccination, and reduction of toxic exposures can all play important roles in reducing cancer risk.

Brain cancer often feels more common than it really is because it receives disproportionate attention. The symptoms can be dramatic and life-changing, including seizures, speech problems, memory loss, personality changes, weakness, paralysis, or loss of normal thinking ability. Because the effects are so visible and frightening, cases tend to be remembered and discussed more often.

Another reason is that brain tumors can affect children, teenagers, and younger adults. When a younger person is diagnosed with a serious brain tumor, it often receives more attention than a more common cancer diagnosed in an older adult.

Brain and central nervous system cancers are also serious. Even though they make up only about 1% of new cancer cases worldwide, some forms, such as glioblastoma, are among the most difficult cancers to treat. This high seriousness makes brain cancer seem more widespread than the raw case numbers suggest.

There is also an important distinction between primary brain cancer and cancer that spreads to the brain. Cancer statistics usually count brain cancer as tumors that begin in the brain or central nervous system. However, many more people develop brain tumors because another cancer spreads there, such as lung cancer, breast cancer, or melanoma. These are called brain metastases, and they are not usually counted as primary brain cancers.

Improved imaging also plays a role. MRI and CT scans are far more common today than they were decades ago, so more brain tumors are found, including some that might have gone undetected in the past.

So while brain cancer is not among the most common cancers by number of new cases, it has an outsized emotional and medical impact. It is often devastating, memorable, and sometimes diagnosed in younger people. If measured by seriousness, public attention, or years of life lost rather than total number of cases, brain tumors would appear much higher on the list.

This site is designed to help users explore clinics, doctors, protocols, and health approaches from around the world. It brings conventional, natural, alternative, experimental, and lesser-known options into one place so users can compare information more easily.

The most dangerous cancers are not necessarily the most common. In many cases, a cancer is considered dangerous because it is difficult to detect early, tends to spread quickly, or has a relatively low long-term survival rate. Some cancers are diagnosed frequently and have good outcomes when found early, while others are less common but far more deadly.

Pancreatic cancer is often considered one of the most dangerous cancers because it usually causes few symptoms until it has already spread. Liver cancer, esophageal cancer, lung cancer, and glioblastoma (a type of brain cancer) are also associated with relatively poor survival rates. These cancers often present at an advanced stage and may be difficult to treat successfully.

The table below ranks major cancers by their approximate danger level based primarily on overall mortality and five-year survival statistics. Survival rates vary depending on stage, age, overall health, available treatments, and individual circumstances.

Most Common Causes of Cancer Death Worldwide

Why aren't the deadliest cancers always the most common?

The most common cancers and the most dangerous cancers are often different. For example, breast cancer and prostate cancer are diagnosed frequently, but many patients survive for years or decades, especially when the disease is detected early. In contrast, pancreatic cancer, glioblastoma, mesothelioma, and certain liver cancers are diagnosed less often but have much lower survival rates.

It is also important to understand that statistics describe large groups of patients and cannot predict an individual's outcome. Advances in surgery, immunotherapy, targeted therapy, radiation therapy, and personalized medicine continue to improve survival for many cancers. Some patients significantly exceed the average expectations, while others may face more aggressive disease. For this reason, prognosis should always be discussed with qualified healthcare professionals familiar with the specific cancer type and stage.

The protocols range from approved conventional allopathic treatments to natural, integrative, experimental, esoteric, and unapproved approaches. The goal is to show the full spectrum of what people may encounter or pursue globally.

No. Being listed does not mean the site endorses, verifies, approves, or guarantees the safety, legality, effectiveness, or quality of any clinic, doctor, or protocol.

The "Woo Woo" scale is a reference tool based on the Western view of medicine. It is not meant to mock, dismiss, or put down non-conventional approaches. It simply helps users understand how mainstream, alternative, experimental, or esoteric a protocol may appear from a conventional medical perspective.

No. The site provides information for comparison and awareness. It does not recommend, prescribe, encourage, or condone any specific treatment, protocol, clinic, doctor, or self-administered activity.

No. Some protocols are not allowed, approved, or available in the United States. In some cases, they may be practiced in other countries where regulations are different or less restrictive.

In some cases, self-administering may be the only way someone can access an unapproved protocol, but we do not encourage or condone this. Everyone has the right to make choices about their own body, but the site takes no responsibility for any outcome. Users should read the disclaimer at the bottom of every page.

No. The clinics section includes both conventional medical facilities and natural or alternative care providers. Green backgrounds identify natural or alternative clinics, while blue backgrounds identify conventional clinics.

Yes. Users should consult a qualified medical professional before beginning, changing, or stopping any treatment or health protocol, especially if it is experimental, unapproved, or outside conventional care.

Of course, it is unlikely that a conventional doctor will approve of an unconventional treatment. If you wish to pursue an unconventional treatment, you are most likely on your own. You may wish to connect with those using the unconventional treatment to learn about the experiences of others.  

Healthcare access, laws, regulations, and available protocols vary by country. Including international clinics and doctors helps users understand where certain approaches may be available and how options differ around the world.

The switch lets users filter clinics by type. You can view all clinics, only conventional facilities, or only natural/alternative facilities.

The disclaimer appears at the bottom of every page. Users should read it carefully before using the information on the site or making any health-related decisions.