Comparison of Transanal Irrigation and Glycerol Suppositories in Treatment of Low Anterior Resection Syndrome

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