epidemiological evaluation of colorectal cancer

this study was carried out to analyze certain epidemiological variations in iranian patients with colorectal cancer. (crc): from march 1981 up to march 1993, 103 patients were analyzed retrospectively for age, gender, marital state, job, nutritional habits, presenting symptoms and histopathological features. most of the patients with colorectal cancer were male, age range 20-75 (mean 56), 25.4 percent were long-term smokers and bleeding was the most common symptom. the rectum was the most common site and moderately differentiated carcinoma was considered as the main common histopathological variety. in conclusion, increasing incidence of colorectal cancer in younger iranian population, below 30 and late admission and diagnosis were the main findings in the present study necessitating screening programs with annual fecal occult blood tests in high risk families.