Spain faces a staggering figure this year: more than 300.000 new cancer diagnoses are projected for 2026. Estimates place the number of cases at around 301.884, representing an increase of nearly 2% compared to the slightly more than 296.000 tumors calculated for 2025, and consolidating an upward trend that has been observed for decades.
This increase is not interpreted as an immediate cause for alarm, but rather as a clear warning: the combination of an aging population, lifestyle changes, and improved detection is driving up the absolute number of diagnoses. At the same time, Spanish oncology experts emphasize that more and more people are living with cancer for years, thanks to increased survival rates, more refined treatments, and clinical research in Spain.
More than 300.000 cancer cases in 2026
According to the report "Cancer Figures in Spain 2026 ," prepared by the Spanish Society of Medical Oncology (SEOM) in collaboration with the Spanish Network of Cancer Registries (REDECAN), 301.884 new diagnoses will be reached in Spain in 2026. This figure represents an increase of nearly 2% compared to the 296.103 cases estimated for 2025 and is part of a sustained growth trend.
Records indicate that, since the early 90s, Spain's population has grown from approximately 39 million to nearly 50 million , with an increasingly aging population. Age is one of the main risk factors for developing cancer, so this aging, combined with population growth and earlier detection, explains a significant portion of the increase in diagnoses.
The projections don't stop at this year: if demographic trends and risk factors persist, the incidence could exceed 350.000 new cases annually around 2050. In other words, Spain will continue to see an increase in the number of tumors, even with advances in prevention and treatment.
The Spanish data fits with the international picture collected by the International Agency for Research on Cancer ( IARC ) and the Global Cancer Observatory , which point to a global increase in both the incidence and mortality of cancer in the coming decades, especially in countries with aging populations and Western lifestyles.
What types of cancer are most frequently diagnosed?
Currently, five types of tumors account for a significant proportion of diagnoses in Spain . By 2026, the most common cancers are expected to be:
- colon and rectal cancer: 44.132 new cases expected.
- Mama: 38.318 estimated diagnoses.
- Lung: around 34.908 cases.
- Prostate: 34.833 new tumors.
- Urinary bladder: about 23.929 diagnoses.
Far behind this first group, the report places other tumors that, although less frequent, represent a significant volume: non-hodgkin lymphomas (12.201 cases), pancreatic cancer (10.405), kidney cancer (9.165), cutaneous melanoma (8.074), tumors of the oral cavity and pharynx (8.203), and cancers of the uterine body (7.759), stomach (7.595) and liver (6.852).
When analyzed by sex, the differences are very marked . Among men, the most common tumors are prostate cancer (34.833 cases), colon and rectal cancer (26.477), lung cancer (23.079), and bladder cancer (19.496). In women, the pattern changes: breast cancer (38.318 diagnoses) and colon and rectal cancer (17.655) predominate, while lung cancer (11.829) has remained the third most frequent tumor in this group since 2019.
Overall, it is estimated that around 168.764 tumors will be diagnosed in men and 133.120 in women in 2026. These figures reflect the impact of certain historical risk factors, such as smoking in men, and the later adoption of some habits among women.
Why are diagnoses increasing?
The increase in the number of cases is not due to a single cause. SEOM and REDECAN point to four major factors that, combined, explain why there will be more than 300.000 cases of cancer in Spain in 2026 :
- Population increaseThere are more inhabitants than in previous decades, so in absolute terms, it is expected that there will also be more diagnoses.
- AgingThe older you are, the greater the likelihood of developing a tumor; and the Spanish demographic structure is clearly aging.
- Exposure to avoidable risk factorsTobacco, alcohol, environmental pollution obesity and sedentary lifestyleunhealthy diets and sedentary lifestyles, among others.
- Better early detectionScreening programs and check-ups allow for the detection of more colon, breast, cervical or prostate tumors in their early stages.
Experts insist that, while the increase in incidence may be alarming, the point is not to spread alarmist messages , but rather to contextualize the phenomenon. Diagnosis is happening earlier, treatment is improving, and people are living with the disease for longer periods. The challenge lies in reinforcing measures that are already known to work: primary prevention, reducing toxins, promoting healthy lifestyles, and participating in screening programs.
Risk factors: tobacco, alcohol, obesity and sedentary lifestyle
One of the most frequently repeated messages from the cancer community is that a significant proportion of tumors could be prevented by reducing certain risk factors. According to the World Health Organization, around one-third of cancer deaths are linked to modifiable habits and exposures, such as smoking, alcohol consumption, infections, physical inactivity, and diets low in fruits and vegetables.
In Spain, tobacco remains a major concern. Although the percentage of smokers has decreased compared to previous decades, nearly 20% of the population continues to smoke daily , according to recent data from the National Institute of Statistics and the Comprehensive Plan for the Prevention and Control of Smoking 2024-2027. Cigarettes are responsible for approximately 90% of lung cancers and are also linked to cancers of the head and neck, bladder, kidney, esophagus, stomach, pancreas, and colon, among others.
Oncologists are also warning about the rise in the use of electronic cigarettes and vaping devices , especially among young people. Although often perceived as less harmful alternatives, scientific societies remind us that they also damage the respiratory system and can contribute to the onset or maintenance of nicotine dependence.
Alcohol is another major negative factor. There is no completely safe level of consumption from an oncological perspective: even small amounts increase the risk of tumors of the esophagus, liver, colon and rectum, breast, or oral cavity . When combined with tobacco, the effect is multiplied and can increase the likelihood of developing certain head and neck cancers by up to 30 times.
Added to this is the role of obesity and overweight , which already affect a significant portion of the Spanish adult population and, particularly worryingly, children and adolescents. Excess weight is associated with at least nine types of cancer (postmenopausal breast, endometrial, colon, kidney, gallbladder, pancreatic, among others) and tends to go hand in hand with sedentary lifestyles and diets high in ultra-processed foods and low in fresh foods.
Radon, physical exercise, and other factors to consider
Beyond the classic risk factors, there are other less visible elements that also influence the risk of developing cancer in Spain. One of these is exposure to residential radon , a radioactive gas that seeps from the subsoil into homes and buildings and is considered the leading cause of lung cancer in people who have never smoked, and the second leading cause in smokers.
Radon concentrations are not uniform across Spain: Galicia, Extremadura, and some areas of the Community of Madrid have particularly high levels. It is estimated that around 3,8% of lung cancer deaths in Spain could be attributed to this gas, a percentage that could reach 7% in the areas with the highest exposure.
On the positive side, regular physical exercise appears to be one of the most powerful tools for reducing risk. Data collected by SEOM indicate that maintaining consistent physical activity could decrease the probability of developing breast, colon, bladder, endometrial, esophageal, and stomach cancers by up to 30% , in addition to reducing the risk of cancer-specific death by almost 20%.
Physical activity not only protects against tumor development but also improves tolerance to cancer treatments, reduces side effects, and helps preserve quality of life both during and after therapy. For this reason, specialists emphasize the importance of incorporating movement into daily routines, even with moderate exercise adapted to each individual's needs.
The focus is also on other factors such as inadequate diets , gut microbiota dysfunction, and the overuse of antibiotics, which could be linked to an increase in certain tumors, especially in young people. Although much remains to be clarified, the importance of maintaining a dietary pattern similar to the Mediterranean diet , rich in fruits, vegetables, legumes, olive oil, and fish, is emphasized.
Increase in cases among young adults
One of the trends that most worries specialists is the growing incidence of cancer in young adults , especially in the 20-39 age group. Although in absolute terms the figures remain much lower than in older age groups, the trends point to an increase that could foreshadow a greater prevalence of these tumors in the future.
REDECAN estimates that in 2026 more than 8.000 cancers will be diagnosed in young adults in Spain , of which approximately 3.400 will be in men and 4.800 in women. In this group, breast cancer will account for around 20,5% of cases and thyroid cancer for approximately 13,4%, in addition to increases in tumors of the colon, pancreas, stomach , testicle, and endometrium.
Among the possible explanations, specialists point to a combination of factors: dietary changes, increased obesity, more sedentary lifestyles, exposure to environmental toxins, and intensive antibiotic use , which could alter the gut microbiota and promote long-term inflammatory processes. However, further research is still needed to fully understand why this phenomenon is occurring.
Globally, the data points in the same direction: in 2022 alone, more than 1,2 million new cancers were diagnosed in adults aged 20 to 39 worldwide, with breast cancer leading the way, followed by thyroid, cervical, and colorectal cancers. Spain, therefore, is no exception to this international trend.
Oncologists emphasize that the increase in young people does not yet significantly impact the overall incidence, but it could foreshadow a future with more diagnoses in middle-aged adults . Therefore, they stress the importance of strengthening prevention from early stages of life and closely monitoring these trends.
Survival: You can live longer and better with cancer
Alongside the increase in cases, the report highlights a relatively positive development: cancer patient survival in Spain has doubled in the last 40 years . Data from REDECAN for the period 2013-2017 reflect a five-year net survival rate of 57,4% in men and 65,2% in women, figures comparable to those of other European countries.
This improvement is not uniform across all types of tumors. In some, the advances have been spectacular, while in others the progression has been much slower. Among men, for example, the five-year survival rate is nearly 94,4% for testicular cancer , 90,2% for prostate cancer, and 88,1% for thyroid cancer. At the opposite end of the spectrum are tumors such as pancreatic cancer (10,3%), esophageal cancer (14,4%), lung cancer (16,3%), and liver cancer (20,3%), with prognoses that remain very challenging.
A similar pattern is observed in women: thyroid cancer has a survival rate of approximately 93,9% , cutaneous melanoma around 91,2%, and breast cancer approximately 86%. However, the results remain very low for pancreatic (12,1%), esophageal (17,5%), liver (18,9%), and lung (23,5%) cancers.
Overall, between the periods 2008–2012 and 2013–2017, male survival increased by 1,3 percentage points and female survival by 2,6 points. Much of this progress is due to earlier diagnosis and the advent of new treatments , from targeted therapies to immunotherapy, which have changed the prognosis for various advanced tumors.
The message from oncologists is that the goal is no longer just to prolong life, but to make that life as similar as possible to the one before the diagnosis: less toxicity, more control of long-term effects, and more support for survivors , who represent an increasingly large group with specific needs.
Mortality: Cancer is now the leading cause of death in Spain
Despite improvements in survival rates, cancer has become the leading cause of death in Spain . Data from the National Institute of Statistics indicates that, in 2024, 436.118 deaths were recorded in the country, of which 115.578 were due to tumors, surpassing for the first time diseases of the circulatory system, which were responsible for 113.620 deaths.
In men, cancer has been the leading cause of death for years: in 2024, 67.790 deaths were attributed to cancer , ahead of cardiovascular diseases (54.257) and respiratory illnesses (26.760). In women, cardiovascular diseases still dominate (59.363 deaths), but cancer is closing the gap with 47.788 deaths, followed by respiratory diseases (23.372).
Regarding the types of tumors that claim the most lives, the pattern is very clear: lung, colon, pancreatic, breast, and prostate cancers account for the majority of deaths . In men, lung cancer remains the leading cause of death, followed by prostate, colon, pancreatic, liver and biliary tract, and bladder cancers. In women, lung cancer has overtaken breast cancer for the first time as the most frequent cause of cancer-related death, with colon and pancreatic cancers also among the most lethal.
In the long term, the projections are not encouraging: globally, cancer deaths are estimated to exceed 18,3 million by 2050. In Spain, models estimate that annual mortality will rise from around 115.000 deaths in 2022 to more than 180.000 in 2050, driven again by aging and the increase in the total number of diagnoses.
Even so, age-adjusted mortality rates have declined significantly in recent decades, reflecting the impact of prevention, screening, and therapeutic improvements . A clear example is stomach cancer, whose mortality rate has been reduced remarkably, compared to pancreatic cancer, where the lack of significant progress in detection and treatment keeps the figures very worrying.
The case of lung cancer is particularly illustrative: in men, mortality has decreased thanks to the decline in smoking , while in women it has increased due to the later incorporation of the smoking habit, which is now reflected in an increase in diagnoses and deaths.
In this context, the projection of approximately 300.000 cancer cases per year in Spain, with sustained growth until mid-century, paints a demanding, but not necessarily hopeless, picture. The challenge lies in strengthening prevention and healthy lifestyles, promoting early detection programs, and ensuring access to therapeutic innovation, while increasingly prioritizing the quality of life of those living with the disease, in a country where cancer will continue to be a major issue, but where survival rates are constantly improving.
