• Parnia Kamyab, Hosein Kouchaki, Mahsa Motamed, Sina Taherzadeh Boroujeni, Hamed Akbari, and Reza Tabrizi.
• Universal Scientific Education and Research Network, Fasa University of Medical Sciences, Fasa, Iran.
• J. Investig. Med. 2023 Mar 1; 71 (3): 163172163-172.

AbstractSleep, accounting for roughly one-third of a person's life, plays an important role in human health. Despite the close association between sleep patterns and medical diseases proven by several studies, it has been neglected in recent years. Presently, all societies are facing the most challenging health-threatening disease, cancer. Among all cancer types, gastrointestinal (GI) cancers, especially colorectal type, seem to be one of the most relevant to an individual's lifestyle; thus, they can be prevented by modifying behaviors most of the time. Previous studies have shown that disruption of the 24-h sleep-wake cycle increases the chance of colorectal cancer, which can be due to exposure to artificial light at night and some complex genetic and hormone-mediated mechanisms. There has also been some evidence showing the possible associations between other aspects of sleep such as sleep duration or some sleep disorders and GI cancer risk. This review brings some information together and presents a detailed discussion of the possible role of sleep patterns in GI malignancy initiation.

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