Signs and symptoms:Early stage colorectal cancer does not typically have symptoms; therefore, screening is usually necessary to detect this cancer in its early stages. Symptoms ofadvanced disease may include rectal bleeding, blood in the stool,a change in bowel habits, cramping pain in the lower abdomen, decreased appetite, or weight loss. In some cases, blood loss from the cancer leads to anemia (low red blood cells), causingsymptoms such as weakness and excessive fatigue. Timely evaluation of symptoms consistent with colorectal cancer in adultsyounger than age 50 is especially important due to the increasein colorectal cancer incidence in this age group in recent years.
Colon Cancer New Cases.
source:American Cancer Society. Cancer Facts & Figures 2013. Atlanta: American Cancer Society; 2013