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Anterior resection syndrome--a risk factor analysis.

Cameron I Wells1, Ryash Vather, Michael J J Chu

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Anterior resection syndrome, a common bowel dysfunction after colorectal surgery, is predicted by lower anastomotic height and obstructive symptoms. Temporary ileostomy also significantly increases risk over time.

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Area of Science:

  • Colorectal Surgery
  • Gastroenterology
  • Surgical Outcomes Research

Background:

  • Anterior resection syndrome (ARS) encompasses a range of evacuatory dysfunctions following distal colorectal resection, including incontinence and obstructed defecation.
  • Identifying risk factors for ARS is crucial for improving patient outcomes after these procedures.

Purpose of the Study:

  • To identify and analyze the risk factors associated with the development of anterior resection syndrome after distal colorectal surgery.
  • To stratify the prevalence and predictors of ARS symptoms over a 5-year post-operative period.

Main Methods:

  • Retrospective evaluation of anterior resections performed at Auckland Hospital between 2002 and 2012.
  • Collection and analysis of patient and peri-operative variables.
  • Stratification of cases based on the presence of ARS symptoms at 1 to 5 years post-surgery.

Main Results:

  • Prevalence of ARS decreased from 61% at 1 year to 43% at 5 years.
  • Lower anastomotic height and obstructive presenting symptoms were independent predictors of ARS at 1-2 years.
  • Temporary diversion ileostomy was a significant independent predictor of ARS from 2 to 5 years post-operatively.

Conclusions:

  • Anastomotic height, post-operative chemotherapy, and obstructive symptoms are key predictors of ARS within the first two years.
  • Temporary diversion ileostomy is a persistent independent predictor of ARS, even when adjusting for anastomotic height.
  • Prospective studies are recommended for more precise risk factor analysis and improved management strategies for ARS.