Comparing transanal irrigation and glycerol suppositories for treating Low Anterior Resection Syndrome

Comparison of Transanal Irrigation and Glycerol Suppositories in Treatment of Low Anterior Resection Syndrome: A Multicentre Randomised Controlled Trial

Phase 3 Interventional University of Aarhus · NCT04087421

This study is testing whether transanal irrigation or glycerol suppositories work better to help people with Low Anterior Resection Syndrome feel better after rectal cancer surgery.

Quick facts

PhasePhase 3
Study typeInterventional
Enrollment114 (estimated)
Ages18 Years and up
SexAll
SponsorUniversity of Aarhus Academic / other
Locations1 site (Aarhus)
Trial IDNCT04087421 on ClinicalTrials.gov

What this trial studies

This multicentre randomized controlled trial aims to compare the effectiveness of transanal irrigation (TAI) versus glycerol suppositories in patients suffering from major Low Anterior Resection Syndrome (LARS) following rectal cancer surgery. Patients who have not responded to personalized conservative treatment will be randomly assigned to receive either TAI or glycerol suppositories for a duration of 12 weeks. The primary endpoint will be assessed at the end of this treatment period to determine which method provides better symptom relief. The study will also stratify participants based on their treatment center and prior neoadjuvant radiotherapy.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 and older who have undergone elective low anterior resection for rectal cancer and have not found relief from previous conservative treatments for LARS.

Not a fit: Patients with prior use of transanal irrigation or those with significant neurological diseases contributing to LARS symptoms may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide a more effective treatment option for patients suffering from LARS, improving their quality of life.

How similar studies have performed: While transanal irrigation has been used in clinical practice, this specific comparison with glycerol suppositories is novel and has not been extensively tested in prior studies.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients electively treated for rectal cancer with a low anterior resection.
* Unsuccessful PCT after at least 4 weeks of treatment for LARS (LARS score \>29 at evaluation).
* At least 3 months after surgery (including reversal of a temporary loop-ileostomy).
* Age \>= 18 years
* Ability to understand written and spoken language actual for the including site (due to questionnaire validity).

Exclusion Criteria:

* Former use of TAI
* Prior systematic use of rectal emptying aids
* Anastomotic stenosis
* History of anastomotic leakage
* Current metastatic disease or local recurrence
* Ongoing oncological treatment
* Postoperative radiotherapy for rectal cancer
* Previous or current cancer in other pelvic organs than the rectum
* Underlying diarrhoeal disease
* Inflammatory bowel disease
* Dementia
* Spinal cord injury, multiple sclerosis, Parkinson's disease or other significant neurologic disease assessed to be a contributory cause to LARS symptoms.
* Inability of patient to use TAI
* Inability and unwillingness to give informed consent
* Pregnancy or intention to become pregnant during the trial period

Where this trial is running

Aarhus

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Low Anterior Resection SyndromeRectal CancerTransanal irrigationGlycerol suppositories
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.