Global Breast Cancer Burden Rising Fastest in Low-Income Countries

Annual new female breast cancer cases worldwide are projected to rise from an estimated 2.3 million in 2023 to more than 3.5 million by 2050, with annual deaths projected to increase from around 764,000 to 1.4 million over the same period, according to the news summary. The summary attributes these forecasts to an analysis published in The Lancet Oncology by the Global Burden of Disease Study Breast Cancer Collaborators. The account does not describe these changes as evenly distributed across settings. The following sections summarise where the reported burden is rising fastest and how incidence and mortality trends are described as differing by country income group.

Age-standardised incidence is described as remaining highest in high-income countries, while the proportional growth in age-standardised new cases is reported to be much larger elsewhere. The summary reports that age-standardised new-case rates have risen sharply in low-income countries, up about 147% on average since 1990, while remaining stable in high-income countries. Mortality trends are presented as diverging as well: age-standardised death rates were reported to have fallen by about 30% on average in high-income countries between 1990 and 2023, but to have almost doubled in low-income countries over the same interval. Taken together, the described pattern is rising incidence alongside less favorable mortality trends in lower-income settings.

The summary also emphasizes that the fastest proportional increases are concentrated in low-income countries and other lower-resource settings, even as age-standardised incidence is described as remaining highest in high-income countries. It contrasts a higher baseline burden in high-income countries with a steeper trajectory in low-income settings, framing this as a divergence in trends rather than a uniform shift. In this account, the projected global rise is paired with widening differences by income group in both where cases are accumulating and how mortality rates are changing.

Key Takeaways:

• The news summary described global annual female breast cancer cases and deaths as increasing from 2023 to 2050.
• Age-standardised incidence was reported to remain highest in high-income countries, while the proportional increase in incidence since 1990 was reported to be much larger in low-income countries.
• Age-standardised death rates were reported to have fallen in high-income countries since 1990 and were reported to have nearly doubled in low-income countries over the same period.