Global breast cancer cases could exceed 3.5 million by 2050

Global breast cancer cases could exceed 3.5 million by 2050

Annual global cancer cases are projected to rise to nearly 35 million by 2050, according to the World Health Organization (WHO) Global Status Report on Cancer 2026. This represents a nearly 70% increase from the 20.6 million new cases recorded in 2024, the agency warns.

Breast cancer, the most diagnosed cancer among women globally, is expected to see a specific surge, with worldwide cases estimated to reach over 3.5 million by 2050. In 2023, an estimated 2.3 million women were diagnosed with breast cancer, resulting in 764,000 deaths. That year, breast cancer accounted for nearly 1 in 4 cancers diagnosed in women worldwide.

A widening global divide

Research published in the journal The Lancet Oncology reveals a deepening disparity between high-income and low-income nations. Between 1990 and 2023, high-income countries saw a nearly 30% decline in breast cancer mortality due to investments in screening, early detection, and treatment. Conversely, deaths from breast cancer in the world’s lowest-income countries nearly doubled during the same period.

The divergence is stark: while the age-adjusted death rate dropped by nearly 30% in high-income nations, it increased by roughly 99% in low-income countries from 1990 to 2023. Diagnosis rates in low-income countries rose by 147% over that period. The impact is most severe in central and western sub-Saharan Africa, where mortality rates are more than double the global average, at roughly 35 deaths per 100,000 people annually after adjusting for age.

Survival rates reflect this gap. The WHO reports that 87% of women with breast cancer survive at least five years after diagnosis in high-income countries, compared to about 42% in low-income countries. Other reports place the survival rate in wealthy nations at 85% and around 40% in poorer nations.

Infrastructure and financial barriers

The disparity is driven by a mismatch between rising diagnosis rates and the infrastructure required for treatment. Treating breast cancer requires a coordinated system of surgery, chemotherapy or targeted treatments, and radiation therapy. As of 2020, only about half of African countries had any external beam radiotherapy service, and none had sufficient capacity for their populations.

Without radiation, mastectomy often becomes the default, though the study notes that surgery has limited effectiveness without postoperative care and systemic therapy. Cost remains a prohibitive barrier; a standard course of the targeted therapy trastuzumab combined with chemotherapy can cost as much as a decade’s average income in some lower-income countries.

These inequities persist even within wealthy nations. In the United States, Black women have a breast cancer death rate 40% higher than White women.

"People’s outcomes from cancer depend on what country they live in,"

Dr. Kamal Menghrajani, oncologist at Massachusetts General Hospital, via sports.yahoo.com

The broader cancer burden

Cancer is currently the second leading cause of death globally, claiming more than 26,000 lives every day. Asia accounts for the largest share of the burden, with 50.7% of all cases and 56.5% of deaths in 2024. Europe contributes 21% of cases and 20% of deaths despite having only about 9% of the world's population.

Nearly four in ten cancer cases are linked to preventable risk factors, including tobacco, alcohol, obesity, physical inactivity, and infections such as human papillomavirus (HPV) and hepatitis B and C. While global tobacco use has declined by 27% since 2010, the WHO warns that rising obesity and air pollution are reshaping the disease profile.

The crisis extends beyond health. A WHO survey found at least 45% of affected people experience financial hardship, and more than half report mental health challenges. Fewer than one in three countries include cancer care in their universal health coverage packages.

Pathways to prevention

The WHO Global Breast Cancer Initiative recommends three pillars to reduce mortality: early identification, timely diagnosis, and access to comprehensive management. For individuals, the most effective lifestyle adjustments to reduce risk include limiting red meat, quitting tobacco, managing blood sugar, maintaining a healthy weight, and curtailing alcohol use.

Medical guidance has also shifted. Monthly breast self-exams are no longer part of standard guidelines because many women find changes related to menstrual cycles. Instead, women are encouraged to note any new lumps, changes in skin or nipple appearance, or shifts in the breast's overall shape.

The US Preventive Services Task Force recommends mammograms every other year for women starting at age 40 through age 74. Without a unified global approach to accessibility and affordability, authors warn that countries will fail to meet the WHO target of a 2.5% annual reduction in mortality worldwide.