This page provides general information about colonoscopy and polypectomy, medical procedures used to examine the colon and remove polyps. This information is not a substitute for professional medical advice. Always consult your healthcare provider to determine if these procedures are suitable for you.
What is Colonoscopy and Polypectomy?
Colonoscopy is a minimally invasive procedure that uses a long, flexible tube with a camera (colonoscope) to examine the lining of the large intestine (colon) and rectum. Polypectomy is performed during colonoscopy to remove polyps, which are abnormal growths that could potentially become cancerous if left untreated. These procedures are widely available in Australia and play a key role in colorectal cancer screening and prevention.
Who is it For?
Colonoscopy and polypectomy may be recommended for adults who:
- Are at average or high risk for colorectal cancer and require screening (typically starting at age 50, or earlier if family history or risk factors are present).
- Experience symptoms such as rectal bleeding, persistent abdominal pain, changes in bowel habits, unexplained weight loss, or anemia.
- Have a history of polyps or colorectal cancer requiring surveillance.
- Need investigation for inflammatory bowel disease or other colonic conditions.
It may not be suitable for everyone. Contraindications include severe bleeding disorders, acute infections, or patients unfit for sedation. Your doctor will review your medical history and symptoms to determine if colonoscopy is appropriate.
How Does it Work?
The colonoscope is inserted through the anus and advanced to visualize the entire colon. Images are displayed on a monitor to identify abnormalities like polyps, inflammation, or tumors. During polypectomy, tools such as snares or forceps are used through the colonoscope to remove polyps safely. Removed tissue is sent for pathological examination. The procedure aids in early detection and prevention of colorectal cancer by removing precancerous lesions.
The Procedure Involved
Colonoscopy and polypectomy are performed under sedation, usually as an outpatient procedure lasting 30-60 minutes:
- Preparation: You will follow a bowel preparation regimen (laxatives and clear liquid diet) to clean the colon. Fasting is required, and medications may be adjusted.
- Sedation: Sedatives are administered for comfort, and monitoring is provided.
- Examination: The colonoscope is inserted, air is inflated for better view, and the colon is inspected.
- Polypectomy: If polyps are found, they are removed using specialized tools.
- Completion: The colonoscope is withdrawn, and you are monitored until sedation wears off, typically 1-2 hours.
No incisions are required, and most patients go home the same day.
Side Effects and Risks
Colonoscopy and polypectomy are generally safe, but potential side effects and risks include:
- Mild cramping, bloating, or gas from air introduced during the procedure.
- Drowsiness or nausea from sedation.
- Minor bleeding, especially after polypectomy.
Rare risks include:
- Significant bleeding requiring intervention.
- Perforation (tear) of the colon wall, which may need surgical repair.
- Adverse reactions to sedation or infection.
Your healthcare provider will monitor you during and after the procedure. Report severe symptoms like severe pain, heavy bleeding, or fever immediately.
Recovery Time
Recovery from colonoscopy and polypectomy is quick:
- Most patients resume normal activities the next day after sedation effects subside.
- You may experience mild cramping or bloating for 1-2 days.
- A normal diet can usually be resumed shortly after, unless polyps were removed, in which case dietary advice may be given.
- Follow-up appointments discuss results, pathology, and any surveillance needs.
Important Disclaimer
This information is general and based on available medical evidence. Outcomes and findings vary between individuals. Colonoscopy and polypectomy should only be performed by qualified healthcare professionals. For personalised advice, risks, and benefits, please consult your doctor or specialist. If you experience any adverse effects, seek medical attention promptly.
Last updated: August 2025.
References
The information provided is supported by the following recent peer-reviewed studies:
- Bourke MJ, Lo SK, Buerlein RCD, Das KK. AGA Clinical Practice Update on Nonampullary Duodenal Lesions: Expert Review. Gastroenterology. 2025 Jan;168(1):169-175. doi: 10.1053/j.gastro.2024.10.0080
- Lv YC, Yao YH, Lei JJ, Tang T. Cold snare polypectomy compared to cold forceps polypectomy for endoscopic resection of guideline defined diminutive polyps: A systematic review and meta-analysis of randomized trials. Indian J Gastroenterol. 2023 Dec;42(6):757-765. doi: 10.1007/s12664-023-01441-wGupta S, Lieberman D, Anderson JC, Burke CA, Dominitz JA, Kaltenbach T, Robertson DJ, Shaukat A, Syngal S, Rex DK. Recommendations for Follow-Up After Colonoscopy and Polypectomy: A Consensus Update by the US Multi-Society Task Force on Colorectal Cancer. Gastroenterology. 2020 Mar;158(4):1131-1153.e5. doi: 10.1053/j.gastro.2019.10.026
- Kaltenbach T, Anderson JC, Burke CA, Dominitz JA, Gupta S, Lieberman D, Robertson DJ, Shaukat A, Syngal S, Rex DK. Endoscopic Removal of Colorectal Lesions: Recommendations by the US Multi-Society Task Force on Colorectal Cancer. Am J Gastroenterol. 2020 Mar;115(3):435-464. doi: 10.14309/ajg.00000000000005551
- Cross AJ, Robbins EC, Saunders BP, Duffy SW, Wooldrage K. Colorectal cancer risk following polypectomy in a multicentre, retrospective, cohort study: an evaluation of the 2020 UK post-polypectomy surveillance guidelines. Gut. 2021 Oct;70(10):1842-1849. doi: 10.1136/gutjnl-2020-321996
- Ortega-Morán JF, Azpeitia Á, Sánchez-Peralta LF, Bote-Curiel L, Pagador B, Cabezón V, Saratxaga CL, Sánchez-Margallo FM. Medical needs related to the endoscopic technology and colonoscopy for colorectal cancer diagnosis. BMC Cancer. 2021 Apr 26;21(1):467. doi: 10.1186/s12885-021-08190-z
- Zauber AG, Winawer SJ, O’Brien MJ, Mills GM, Allen JI, Feld AD, Jordan PA, Fleisher M, Orlow I, Meester RGS, Lansdorp-Vogelaar I, Rutter CM, Knudsen AB, Mandelson M, Shaukat A, Mendelsohn RB, Hahn AI, Lobaugh SM, Soto Palmer B, Serrano V, Kumar JR, Fischer SE, Chen JC, Bayuga-Miller S, Kuk D, O’Connell K, Church TR. Randomized Trial of Facilitated Adherence to Screening Colonoscopy vs Sequential Fecal-Based Blood Test. Gastroenterology. 2020 Nov;159(5):1770-1780. doi: 10.1053/j.gastro.2020.07.019
- Singh R, Jayanna M, Wong J, Lim J, Zhang G, Hourigan L, Zanati S. Imaging colonic polyps in 2024. Indian J Gastroenterol. 2024 Oct;43(5):890-899. doi: 10.1007/s12664-024-01685-2
- Von Renteln D, Bouin M, Barkun AN. Current standards and new developments of colorectal polyp management and resection techniques. Expert Rev Gastroenterol Hepatol. 2017 Sep;11(9):835-842. doi: 10.1080/17474124.2017.1309279
- Rex DK, Shaukat A, Gupta S. Follow-up after colonoscopy and polypectomy. Gastroenterology. 2020 Mar;158(4):1131-1153.e5. doi: 10.1053/j.gastro.2019.10.026
