Sleep fragmentation and cancer

Some studies have linked obstructive sleep apnea (OSA) to cancer. This study shows that sleep fragmentation in mice was associated with larger, more aggressive tumors than mice that did not have sleep fragmentation. Since I don't have access to the full article, it's unclear how the sleep fragmentation was produced. Also, OSA can cause sleep fragmentation but also low oxygen levels, and low oxygen could be linked to tumors. Either way, it's thought that OSA causes a systemic inflammatory response, and this may be what is linked to cancer.