Urinary dysfunction after rectal cancer treatment is mainly caused by surgery

Area of Science:

• Oncology
• Urology
• Surgical Outcomes

Background:

• Urinary dysfunction (UD) is a frequent complication following rectal cancer treatment.
• The specific roles of surgery and radiotherapy in causing UD are not well-defined.

Purpose of the Study:

• To assess urinary dysfunction up to 5 years after rectal cancer surgery (total mesorectal excision).
• To determine the impact of preoperative radiotherapy and surgical variables on UD development.

Main Methods:

• 785 rectal cancer patients were randomized to total mesorectal excision with or without preoperative radiotherapy.
• Urinary dysfunction was assessed using questionnaires pre- and post-surgery.
• Multivariable regression analyzed risk factors like radiotherapy, demographics, tumor location, and resection details.

Main Results:

• Long-term urinary incontinence affected 38.1% of patients; preoperative incontinence and female sex were significant risk factors.
• 30.6% experienced long-term difficulty emptying the bladder; preoperative issues, blood loss, and nerve damage were key factors.
• Preoperative radiotherapy was not associated with an increased risk of urinary dysfunction.

Conclusions:

• Urinary dysfunction is a significant clinical issue post-rectal cancer treatment.
• The development of UD is primarily linked to surgical nerve damage, not preoperative radiotherapy.
• Identifying and mitigating surgical nerve damage is crucial for preventing urinary dysfunction.