Cai Wenjun/Shanghai Daily news

Shanghai has the highest incidence of breast cancer in China. More than 60 in every 100,000 women in the city contract the disease. About 6.4 percent of those who do are under 35 years old, medical experts said over the weekend, Shanghai Daily reported.

"The incidence of breast cancer is rising in China due to the changing lifestyle, the increasing pace of life and rising pressure," said Dr Shao Zhimin from the Shanghai Tumor Hospital. "Though the disease is most prevalent in Chinese women between the ages of 40 and 45, more young women have started to develop the disease. It may relate to family history and personal genetic problems, or overconsumption and the improper use of medical treatments, many of which contain a high dose of female hormones."