Long-term in the higher levels of silica dust, such as mining, Fansha, sandblasting, the system ceramics, refractories, and other places of work of the Yi breast cancer.

• 长期在二氧化硅粉尘含量较高的地方，如采矿、翻砂、喷砂、制陶瓷、制耐火材料等场所工作的人易患此病。