PMID- 36059323 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220907 IS - 2168-8184 (Print) IS - 2168-8184 (Electronic) IS - 2168-8184 (Linking) VI - 14 IP - 8 DP - 2022 Aug TI - Colon Cancer and Obesity: A Narrative Review. PG - e27589 LID - 10.7759/cureus.27589 [doi] LID - e27589 AB - Obesity has played a crucial role in the pathogenesis of various cancers, including colorectal cancer (CRC). Obesity has shown to increase the blood levels of insulin, insulin-like growth factor-1 (IGF-1), leptin, resistin, inflammatory cytokines such as interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-alpha), monocyte chemoattractant protein-1 (MCP-1) which in turn acts via various signaling pathways to induce colonic cell proliferation and in turn CRC development. It has been shown that estrogen can prevent and cause CRC based on which receptor it acts. Obese patients have relatively low levels of ghrelin and adiponectin that inhibit cell proliferation which further adds to their risk of developing CRC. Obesity can alter the microbial flora of the gut in such a way as to favor carcinogenesis. Weight loss and good physical activity have been related to a reduced incidence of CRC; obese individuals should be screened for CRC and counseled about the importance of weight reduction, diet, and exercise. The best way of screening is using BMI and waist circumference (WC) to calculate the CRC risk in obese people. This study has reviewed the association between obesity and its pathophysiological association with CRC development. CI - Copyright (c) 2022, Duraiyarasan et al. FAU - Duraiyarasan, Shrimahitha AU - Duraiyarasan S AD - Research, K.A.P. Viswanatham Government Medical College, Tiruchirappalli, IND. FAU - Adefuye, Mayowa AU - Adefuye M AD - Research, University of Ibadan College of Medicine, Ibadan, NGA. FAU - Manjunatha, Nisha AU - Manjunatha N AD - Research, Our Lady of Fatima University College of Medicine, Metro Manila, PHL. FAU - Ganduri, Vinutna AU - Ganduri V AD - Research, Bhaskar Medical College, Hyderabad, IND. FAU - Rajasekaran, Kruthiga AU - Rajasekaran K AD - Research, Rajah Muthiah Medical College and Hospital, Chidambaram, IND. LA - eng PT - Journal Article PT - Review DEP - 20220801 PL - United States TA - Cureus JT - Cureus JID - 101596737 PMC - PMC9433794 OTO - NOTNLM OT - colorectal cancer (crc) OT - estrogen and crc OT - ghrelin and crc OT - obesity and cancer OT - obesity and inflammatory markers OT - obesity and mutation OT - oxidative dna damage OT - resistin and cancer OT - role of gut microbiomes in cancer OT - role of obesity and diabetes COIS- The authors have declared that no competing interests exist. EDAT- 2022/09/06 06:00 MHDA- 2022/09/06 06:01 PMCR- 2022/08/01 CRDT- 2022/09/05 03:34 PHST- 2022/07/30 00:00 [accepted] PHST- 2022/09/05 03:34 [entrez] PHST- 2022/09/06 06:00 [pubmed] PHST- 2022/09/06 06:01 [medline] PHST- 2022/08/01 00:00 [pmc-release] AID - 10.7759/cureus.27589 [doi] PST - epublish SO - Cureus. 2022 Aug 1;14(8):e27589. doi: 10.7759/cureus.27589. eCollection 2022 Aug.