Colon Cancer Right & Left Symptoms
Colon cancer is a potentially curable disease if it is caught in the early stages. This is the reason the American Cancer Society has recommended screening people starting at age 50. The symptoms of colon cancer vary according to location of the cancer within the colon as well as any spread outside the colon. The colon is divided into four main sections--ascending or right colon, transverse colon, descending or left colon, and the sigmoid colon. The sigmoid colon is considered a part of the left colon. The colonic contents travel from the small intestine up the ascending colon then along the transverse colon then down the descending colon and sigmoid before entering the rectum.
If you are experiencing serious medical symptoms, seek emergency treatment immediately.
Ascending Colon Symptoms
Cancers in this part of the colon tend to go unnoticed for a long time. They may grow to quite large sizes before causing any symptoms. People with these malignancies may feel a mass in the right abdomen, have abdominal pain, fever, profuse sweating--especially at night--and anemia. The symptoms of anemia include weakness, easy fatiguability, shortness of breath and palpitations. These symptoms are explained by the anatomy of ascending colon. The ascending colon is wider than its descending counterpart, which allows for more growth of tumor before the tumor causes symptoms. Also the tumors that develop in the ascending colon tend to grow along the wall of the colon instead of directly outward into the lumen. Symptoms on the left side of the colon are usually caused by growth outward into the lumen, obstructing the flow of feces.
- Cancers in this part of the colon tend to go unnoticed for a long time.
- The ascending colon is wider than its descending counterpart, which allows for more growth of tumor before the tumor causes symptoms.
Descending Colon Symptoms
Feeling Bloated & Backaches
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The symptoms of left-sided colon cancer are attributed the anatomy of that area 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. People experience increasing bouts of constipation. They may also notice a change in the caliber of the stool 1. The stool may also be coated with streaks of blood. Though these symptoms may also be seen in cancers in the right colon, they are most often seen in the left because the stool is more solid in the descending and sigmoid colon. The stool is still in liquid form in the ascending colon. Often, people with left-sided cancers present to the emergency room with a quartet of symptoms--abdominal pain, abdominal distention, vomiting and constipation. **These are symptoms of bowel obstruction, a surgical emergency 1. This occurs when the lumen of the colon has been completely obstructed by cancer. The obstructed segment of the colon becomes markedly swollen and does not function as it should. Bowel obstruction may also be seen in right-sided cancers but is far more common on the left
- The symptoms of left-sided colon cancer are attributed the anatomy of that area of the colon.
- The obstructed segment of the colon becomes markedly swollen and does not function as it should.
Transverse Colon Symptoms
Cancer in the transverse colon has a mixture of the symptoms experienced in right and left colon due to the semi-solid nature of stool in this segment. People may experience some chronic pain and anemia along with intermittent constipation.
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References
- "Sabiston Textbook of Surgery"; Townsend Jr., C et al.; 2008
- "Swartz: Principles of Surgery"; Swartz, S et al.; 1999
- Carethers JM. Risk factors for colon location of cancer. Transl Gastroenterol Hepatol. 2018;3:76. doi:10.21037/tgh.2018.09.15.
- Aykan NF. Red meat and colorectal cancer. Oncol Rev. 2015;9(1):288. doi:10.4081/oncol.2015.288.
- Rossi M, Jahanzaib anwar M, Usman A, Keshavarzian A, Bishehsari F. Colorectal cancer and alcohol consumption-populations to molecules. Cancers (Basel). 2018;10(2). doi:10.3390/cancers10020038.
- Hermann J, Karmelita-katulska K, Paszkowski J, Drews M, Stajgis M. Diagnosis of a cecal tumour with virtual colonoscopy. Pol J Radiol. 2011;76(2):25-7.
- Carethers JM. Risk factors for colon location of cancer. Transl Gastroenterol Hepatol. 2018;3:76. doi:10.21037/tgh.2018.09.15.
- Kunzmann AT, Coleman HG, Huang WY, Kitahara CM, Cantwell MM, Berndt SI. Dietary fiber intake and risk of colorectal cancer and incident and recurrent adenoma in the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial. Am J Clin Nutr. 2015;102(4):881-90. doi: 10.3945/ajcn.115.113282.
- Aykan NF. Red meat and colorectal cancer. Oncol Rev. 2015;9(1):288. doi:10.4081/oncol.2015.288.
- Rossi M, Jahanzaib anwar M, Usman A, Keshavarzian A, Bishehsari F. Colorectal cancer and alcohol consumption-populations to molecules. Cancers (Basel). 2018;10(2). doi:10.3390/cancers10020038.
- American Cancer Society. (2006). American Cancer Society’s Complete Guide to Colorectal Cancer. Clifton Fields, NE: American Cancer Society.
- Harvard School of Public Health. (n.d.). Protein: What Should I Eat?
- Witmer, L. (2007, January 23). Clinical anatomy of the large intestine.
Writer Bio
Gary Brown is a medical doctor who has been practicing medicine for the past five years. He has given written and oral presentations on various medical topics for the past three years, primarily on surgical topics. He currently writes articles for LIVESTRONG.