Right And Left Sided Colon Cancer

H o what is the definition of right sided vs left sided colon cancer.

Right and left sided colon cancer. When it comes to colon cancer location matters. Int j med sci. People experience increasing bouts of constipation. The symptoms of left sided colon cancer are attributed the anatomy of that area of the colon.

No polyps potentially precancerous growths on the left side meant that the right colon would be fine since more cancers do in fact arise in the rectum or left side of the colon. The colon is divided into two halves left and right and while these two sides appear similar enough more or less equal a new study suggests this is not the case at all. Accordingly epidemiologic and histologic differences in proximal and distal crcs have been observed. Av in the analysis of the cancer and leukemia group b calgb swog 80405 trial that we presented at the 2016 annual meeting of the american society of clinical oncology asco we defined right sided colon cancer as cancer of the cecum and the ascending colon up to the hepatic flexure.

Cai x gu d chen m et al. Colorectal cancer crc is the fourth most commonly diagnosed cancer and the second leading cause of cancer death in the united states 1 with heterogeneous outcomes and diverse underlying pathobiologic and molecular characteristics. Patients with right sided tumors have a worse prognosis than patients with left sided tumors. The occurrence of colon cancer on the right vs left side of the colon is a prognostic factor for all stages of the disease according to a large meta analysis published in jama oncology the left vs right sidedness of the primary tumor within the colon should be considered when deciding on intensity of treatment for metastatic disease and may be a way to stratify patients for adjuvant colon.

Updated may 23 2016 there is a big difference in colorectal cancer when it occurs on the right side compared with the left side according to a new analysis of data from a large federally. Better survival in right sided versus left sided stage i iii colon cancer patients. Patients with right sided crcs are more likely to be women. For years the primary tool of colorectal cancer screening was a sigmoidoscope which only views the left side of the colon.

The lumen of the colon is smaller than that of its counterpart on the right and therefore the symptoms experienced are due to obstruction of the lumen. The primary symptom is a change in bowel habits. However when colorectal cancer does recur right sided tumors still have a worse prognosis or are more aggressive than left sided tumors.