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Beijing municipal health authorities said on Friday that the number of lung cancer patients in the city has been rising over the last decade, without elaborating on what might have caused the rise.
The number of lung cancer patients per 100,000 people was 63.09 in 2011, compared with 39.56 registered in 2002, according to the Beijing Municipal Health Bureau, citing figures from the city's tumor prevention and treatment office.
In 2011, Beijing reported a total of 7,999 new lung cancer cases, accounting for 20.8 percent of the malignant tumor cases that year.
The bureau said lung cancer is the most common disease among male malignant tumor patients.
The statistics also showed that the lung cancer incidence rises as people age, and male patients outnumber female patients after the age of 35.
Health experts with the Beijing Cancer hospital said lung cancer is highly linked to lifestyle, noting that smoking is the top reason for the disease, followed by passive smoking and environmental pollution, such as air pollution.
People with respiratory diseases are more likely to contract lung cancer, the experts added.
