Colorectal Polyps in Symptomatic and Asymptomatic Iranian Patients Undergoing Colonoscopy from 2009-2013

Colorectal cancer (CRC) is the third most common cancer in the United States and the second form leads to cancer death, although recently intense screening schedule declining the incidence rate (Levin et al., 2008; Siegel et al., 2012) Males are more likely to develop CRC than women (Murphy et al., 2011). Alteration in bowel habit, rectal bleeding, abdominal pain, diarrhea, constipation and weight loss are the most symptoms in affected individuals (Norrelund and Norrelund, 1996; Mulcahy and O’Donoghue, 1997). Age is consider as a main risk factor for colorectal cancer (Howlader et al., 2010). Other risk factors for susceptibility to CRC mentioned as low physical activity, obesity(Karagianni et al., 2010) consumption of charred meats, cigarette smoking (Burnett-Hartman et al., 2011) alcohol use and diet regimen (Neri et al., 2011).