- 1 Which CRC patients should be followed up with surveillance colonoscopy?
- 2 Evidence summary and recommendations
- 3 References
Which CRC patients should be followed up with surveillance colonoscopy?
The Australian Clinical Practice Guidelines for the prevention, early detection and management of CRC, 2nd edition, 2005 proposed that follow-up should be offered to all patients who have undergone curative surgery and are fit for further intervention if disease is detected. This includes patients who have had malignant polypectomy or curative endoscopic resection of Stage I CRC but excludes patients with Stage IV CRC if their treatment does not offer the possibility of cure.
Risk factors for local recurrence following resection for colorectal cancer
Recent studies suggest that follow-up after CRC resection could perhaps be customised according to a patient’s individual risk. For example, a number of studies have determined features of a primary CRC which increase the risk of local recurrence at the surgical anastomosis. Most importantly though, anastomotic recurrence occurs far more often in rectal cancer patients than in colon cancer patients. Local recurrence is also more likely to occur in patients undergoing local excision (including transanal endoscopic microsurgery) of their rectal primary cancers and unfortunately, many of these recurrences are associated with extra-colonic disease or local spread and are not curable. With respect to this review, the vast majority of these rectal anastomotic recurrences are within reach of digital rectal examination or sigmoidoscopy and their detection does not require full colonoscopy.
The optimal combination and frequency of investigations in follow-up of patients after CRC resection has not been determined. Importantly, the performance of annual colonoscopy has not been shown to improve five-year survival. A meta-analysis by Tjandra et al concluded that intensive follow-up increased the re-resection rate for recurrent disease and improved overall survival but the survival advantage was not due to earlier detection of recurrence and cancer-related mortality was no better.
The focus of the current chapter is on the use of surveillance colonoscopy. Although colonoscopy allows inspection of the anastomosis in passing, the principal purpose of surveillance colonoscopy after CRC resection is the detection of metachronous neoplasia. Thus, the above-mentioned risk factors for luminal/anastomotic recurrence are of limited relevance to the question of when surveillance colonoscopy should be performed following CRC surgery.
Risk factors for metachronous neoplasia following resection for colorectal cancer
Having developed one CRC, patients are at risk for the development of metachronous polyps and their progression to metachronous cancers; Bouvier et al reported the incidence of metachronous cancer as being 1.8% at five years, 3.4% at 10 years, and 7.2% at 20 years with the greatest excess risk between one and five years post-surgery.
Preoperative colonoscopy is important to detect and treat synchronous polyps and cancers but may also assist in predicting which patients are more likely to develop future adenomas and cancers during follow-up. Some authors of both original studies and literature reviews have reported that the presence of synchronous polyps or cancers is a risk factor for metachronous CRC and for metachronous adenomatous polyps. However, in a recent population-based study by Bouvier et al, using a cancer registry as the source of information, no patient or tumour characteristics could be identified to predict which CRC patients would develop a metachronous cancer. Other authors have likewise failed to identify any link between synchronous adenomas and the development of subsequent metachronous CRC.
Primary tumour location is also a risk factor for the development of metachronous cancer. In a study of more than 500 CRC patients from a cancer registry database, patients whose first cancer was located proximal to splenic flexure were found to be at twice the risk for developing a metachronous cancer compared to those with a first cancer in the distal colon.
Metachronous and synchronous tumours are features of Lynch syndrome (also known as hereditary non-polyposis colorectal cancer or HNPCC). A propensity for metachronous and synchronous colorectal cancers with a predilection for the proximal colon and development of cancer at an early age are well recognised characteristics of Lynch syndrome.
Thus, reported studies have disagreed about whether patients who have undergone CRC resection can be stratified with regard to their risk of future development of metachronous polyps and cancers. Even in those studies where a positive predictive factor was identified, the strength of the association with the development of future colonic neoplasia was insufficiently strong to exclude patients without the factor from colonoscopic surveillance.
Patient groups at very high risk for metachronous neoplasia following resection for colorectal cancer
In certain patients who have undergone curative resection for CRC, clinical features, family history and the findings at the pre-operative colonoscopy may dictate the need for particularly intense post-operative surveillance colonoscopy (see Chapter 7 of the Clinical Practice Guidelines for the Prevention, Early Detection and Management of Colorectal Cancer, 2nd edition, 2005).
In other groups of patients considered to be at increased risk of metachronous disease, consideration may be given following surgery to continuing with more frequent surveillance than would otherwise be recommended (e.g. initial post-operative colonoscopy at one year and then annually, second-yearly or third-yearly. These patients include those (i) whose initial diagnosis was made younger than 40 years of age, (ii) with probable or possible HNPCC (i.e. patients whose tumours are MSI-high and less than 50 years old at time of initial cancer diagnosis but not proved by genetic testing to have HNPCC), (iii) with hyperplastic polyposis and BRAF mutation and (iv) with multiple synchronous cancers or advanced adenomas at initial diagnosis.
Evidence summary and recommendations
- Chan CL, Bokey EL, Chapuis PH, Renwick AA, Dent OF. Local recurrence after curative resection for rectal cancer is associated with anterior position of the tumour. Br J Surg 2006 Jan;93(1):105-12 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/16302179].
- Manfredi S, Bouvier AM, Lepage C, Hatem C, Dancourt V, Faivre J. Incidence and patterns of recurrence after resection for cure of colonic cancer in a well defined population. Br J Surg 2006 Sep;93(9):1115-22 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/16804870].
- Obrand DI, Gordon PH. Incidence and patterns of recurrence following curative resection for colorectal carcinoma. Dis Colon Rectum 1997 Jan;40(1):15-24 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/9102255].
- Aste H, Saccomanno S, Pugliese V, Santi L. Colonoscopy in patients previously submitted to partial colectomy for colorectal cancer. Acta Endoscopica. 1982;12(3):219-227.
- Barillari P, Ramacciato G, Manetti G, Bovino A, Sammartino P, Stipa V. Surveillance of colorectal cancer: effectiveness of early detection of intraluminal recurrences on prognosis and survival of patients treated for cure. Dis Colon Rectum 1996 Apr;39(4):388-93 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/8878497].
- Renehan AG, Egger M, Saunders MP, O'Dwyer ST. Impact on survival of intensive follow up after curative resection for colorectal cancer: systematic review and meta-analysis of randomised trials. BMJ 2002 Apr 6;324(7341):813 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/11934773].
- Gervaz P, Bucher P, Neyroud-Caspar I, Soravia C, Morel P. Proximal location of colon cancer is a risk factor for development of metachronous colorectal cancer: a population-based study. Dis Colon Rectum 2005 Feb;48(2):227-32 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/15711864].
- Kobayashi H, Mochizuki H, Sugihara K, Morita T, Kotake K, Teramoto T, et al. Characteristics of recurrence and surveillance tools after curative resection for colorectal cancer: a multicenter study. Surgery 2007 Jan;141(1):67-75 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/17188169].
- Juhl G, Larson GM, Mullins R, Bond S, Polk HC Jr. Six-year results of annual colonoscopy after resection of colorectal cancer. World J Surg 2016 Jul 1;14(2):255-60; discussion 260-1 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/2327099].
- Barrier A, Houry S, Huguier M. The appropriate use of colonoscopy in the curative management of colorectal cancer. Int J Colorectal Dis 1998;13(2):93-8 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/9638495].
- Khoury DA, Opelka FG, Beck DE, Hicks TC, Timmcke AE, Gathright JB Jr. Colon surveillance after colorectal cancer surgery. Dis Colon Rectum 1996 Mar;39(3):252-6 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/8603543].
- Renehan AG, O'Dwyer ST, Whynes DK. Cost effectiveness analysis of intensive versus conventional follow up after curative resection for colorectal cancer. BMJ 2004 Jan 10;328(7431):81 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/14715603].
- Jeffery M, Hickey BE, Hider PN. Follow-up strategies for patients treated for non-metastatic colorectal cancer. Cochrane Database Systems Review 2007;Issue 1: Art. No.: CD002200. DOI: 10.1002/14651858.CD002200.pub2.
- Schoemaker D, Black R, Giles L, Toouli J. Yearly colonoscopy, liver CT, and chest radiography do not influence 5-year survival of colorectal cancer patients. Gastroenterology 1998 Jan;114(1):7-14 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/9428212].
- Tjandra JJ, Chan MK. Follow-up after curative resection of colorectal cancer: a meta-analysis. Dis Colon Rectum 2007 Nov;50(11):1783-99 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/17874269].
- Bouvier AM, Latournerie M, Jooste V, Lepage C, Cottet V, Faivre J. The lifelong risk of metachronous colorectal cancer justifies long-term colonoscopic follow-up. Eur J Cancer 2008 Mar;44(4):522-7 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/18255278].
- Fajobi O, Yiu CY, Sen-Gupta SB, Boulos PB. Metachronous colorectal cancers. Br J Surg 1998 Jul;85(7):897-901 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/9692559].
- Yamazaki T, Takii Y, Okamoto H, Sakai Y, Hatakeyama K. What is the risk factor for metachronous colorectal carcinoma? Dis Colon Rectum 1997 Aug;40(8):935-8 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/9269810].
- Togashi K, Konishi F, Ozawa A, Sato T, Shito K, Kashiwagi H, et al. Predictive factors for detecting colorectal carcinomas in surveillance colonoscopy after colorectal cancer surgery. Dis Colon Rectum 2000 Oct;43(10 Suppl):S47-53 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/11052478].
- Ballesté B, Bessa X, Piñol V, Castellví-Bel S, Castells A, Alenda C, et al. Detection of metachronous neoplasms in colorectal cancer patients: identification of risk factors. Dis Colon Rectum 2007 Jul;50(7):971-80 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/17468913].
- Hassan C, Gaglia P, Zullo A, Scaccianoce G, Piglionica D, Rossini FP, et al. Endoscopic follow-up after colorectal cancer resection: an Italian multicentre study. Dig Liver Dis 2006 Jan;38(1):45-50 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/16216566].
- Lan YT, Lin JK, Li AF, Lin TC, Chen WS, Jiang JK, et al. Metachronous colorectal cancer: necessity of post-operative colonoscopic surveillance. Int J Colorectal Dis 2005 Mar;20(2):121-5 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/15349739].
- Brady PG, Straker RJ, Goldschmid S. Surveillance colonoscopy after resection for colon carcinoma. South Med J 1990 Jul;83(7):765-8 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/2371598].
- Lynch HT, Smyrk TC, Watson P, Lanspa SJ, Lynch JF, Lynch PM, et al. Genetics, natural history, tumor spectrum, and pathology of hereditary nonpolyposis colorectal cancer: an updated review. Gastroenterology 1993 May;104(5):1535-49 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/8482467].
- Watson P, Lynch HT. Extracolonic cancer in hereditary nonpolyposis colorectal cancer. Cancer 1993 Feb 1;71(3):677-85 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/8431847].
- Fante R, Roncucci L, Di GregorioC, Tamassia MG, Losi L, Benatti P, et al. Frequency and clinical features of multiple tumors of the large bowel in the general population and in patients with hereditary colorectal carcinoma. Cancer 1996 May 15;77(10):2013-21 [Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/8640664].