Breast cancer overtakes lung as most common cancer, WHO says

Breast cancer has overtaken lung cancer as the most common form of the disease, accounting for nearly 12 per cent of new cases each year worldwide, the World Health Organization (WHO) said on Tuesday.

“For the first time, breast cancer now constitutes the most commonly occurring cancer globally,” Andre Ilbawi, a cancer specialist at the WHO, told a UN briefing ahead of World Cancer Day on Thursday.

Lung cancer was the most common type for the last two decades, but is now in second place, ahead of colorectal cancer, which is the third-most widespread, Ilbawi said.

An estimated 2.3 million new cases of breast cancer were diagnosed last year, representing 11.7 per cent of all cancer cases, the WHO said in a statement. “Among women, breast cancer is the most commonly diagnosed cancer and the leading cause of cancer death worldwide,” it said.

Ilbawi noted that obesity in women was a common risk factor in breast cancer, and is also driving overall cancer numbers.

30M new cancer cases a year by 2040: WHO

As the global population grows and life expectancy increases, cancer is expected to become more common, rising to about 30 million new cases per year in 2040 from 19.3 million in 2020, Ilbawi said.

The WHO, warning against risk factors, said that around one third of deaths from cancer are due to tobacco use, high body mass index, low fruit and vegetable intake, lack of physical activity and alcohol use.

The coronavirus pandemic is disrupting cancer treatment in about half the countries it surveyed, Ilbawi said, pointing to delays in diagnosis, health-care workers under extreme stress and research being impacted.

Last year, researchers with the Canadian Cancer Society estimated there will be 225,800 new diagnoses of cancer in 2020 in this country — with cases of lung cancer (29,800), breast cancer (27,700), colorectal cancer (26,900) and prostate cancer (23,300) accounting for almost half (48 per cent) of new diagnoses.

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