Using vaginal dilators to reduce vaginal stenosis in anal cancer patients during radiotherapy

Intrafractional Vaginal Dilation in Anal Cancer Patients Undergoing Pelvic Radiotherapy - Prospective, Randomized, Two-armed Phase-II-study

NA · University Hospital Heidelberg · NCT04094454

This study is testing whether using a larger tampon for vaginal dilation during pelvic radiotherapy can help women with anal cancer avoid problems like vaginal narrowing after treatment.

Quick facts

PhaseNA
Study typeInterventional
Enrollment60 (estimated)
Ages18 Years and up
SexFemale
SponsorUniversity Hospital Heidelberg (other)
Drugs / interventionsradiation
Locations1 site (Heidelberg)
Trial IDNCT04094454 on ClinicalTrials.gov

What this trial studies

This clinical trial investigates the effectiveness of intrafractional vaginal dilation using different tampon sizes in female patients undergoing pelvic radiotherapy for anal cancer. It is a prospective, randomized, two-armed trial involving 60 patients who will be assigned to either a standard or a larger tampon for vaginal dilation during treatment. The primary goal is to assess the incidence and severity of vaginal fibrosis 12 months post-radiotherapy, with secondary endpoints including clinical symptoms, toxicity, compliance, and quality of life. The study aims to determine if the larger tampon can significantly reduce the rate of vaginal stenosis compared to the standard size.

Who should consider this trial

Good fit: Ideal candidates are female patients over 18 years old with histologically confirmed squamous anal cancer who are scheduled for definitive or postoperative radiotherapy.

Not a fit: Patients who have previously undergone pelvic irradiation or cannot undergo vaginal dilation prior to treatment may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could significantly reduce the incidence of vaginal stenosis in anal cancer patients, improving their quality of life post-treatment.

How similar studies have performed: While similar approaches have been explored, this specific method of intrafractional vaginal dilation in the context of anal cancer treatment is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Female patient
* Histologically confirmed squamous anal cancer
* Indication for definitive or postoperative radiotherapy
* ECOG 0-2
* Age \> 18 years
* Written informed consent

Exclusion Criteria:

* patients refusal or incapability of informed consent
* no vaginal dilatation possible prior to radiation treatment start
* prior pelvic irradiation (if direct field border or even overlap of radiation fields assumed)
* participation in another clinical trial which might influence the results of the DILANA trial
* pregnancy/nursing period or inadequate contraception in women with child bearing potential

Where this trial is running

Heidelberg

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.

View on ClinicalTrials.gov →

Conditions: Anal Cancer, female patients, quality of life, vaginal dilator, vaginal fibrosis

Last reviewed 2026-05-15 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.