[Cancer and lifestyle-related diseases risk among shifts workers].

Shift work is unavoidable and roughly 15-20% of workers are estimated to work on shift schedules worldwide. On 2007, the International Agency for Research on Cancer (IARC) panel concluded that shift work that involves circadian disruption is probably carcinogenic in humans. The risk has become a growing concern of public health. Shift work could not be exterminated though, there are possible protective measures; such as a nap system during night work to modulate burden of night work, and breast cancer screening program among female shift workers for early detection of the disease. This paper reviews current evidence on that risk and points out contentions for the risk communication.