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Could 3 radiation sessions be enough for prostate cancer?

NCT ID NCT06914544

Disease control Sponsor: University Hospital Schleswig-Holstein Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study is testing a new, shorter radiation treatment for men with early-stage prostate cancer. Instead of the usual 5 sessions, doctors will give 3 high-dose radiation treatments. The goal is to see if this approach is safe and causes fewer side effects while still controlling the cancer. About 175 men will take part, and researchers will track side effects and quality of life for one year.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
radiation therapy (hypofractionated radiosurgery)
What this could lead to
If successful, this could offer a more convenient and less toxic radiation option for men with localized prostate cancer, reducing treatment from 5 sessions to 3.
What could go wrong
This is a mid-stage trial with only 175 participants, so results may not apply to everyone. There is still a risk of urinary or bowel side effects, and the treatment may not control the cancer as well as standard approaches.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 175 people

The number the study aims to enrol. It can still change while the study runs.

Started

Dec 2025

Expected to finish

Dec 2029

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Male participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Localised, histopathologically confirmed Prostate Cancer (cT1-T2c N0 M0) * Gleason-grade ≤7, ISUP Grade Group 1-3 * Guideline-based staging * Age ≥ 18 years * PSA \< 20 ng/ml * Volume of the prostate \< 80 cm³ * IPSS-Score ≤ 12 * Written informed consent Exclusion Criteria: * History of prior pelvic radiotherapy * Previous transurethral resection, laser enucleation or prostate ablation * Contraindication to MRI or Fiducial marker implantation (e.g. gold allergy) * Relevant comorbidity thought to adversely affect treatment compliance * Legal incapacity or lack of informed consent

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Conditions

The condition(s) this trial relates to.

prostate cancer prostate carcinoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Prostate cancer

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    5 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • CyberKnife Centrum Mitteldeutschland

    RECRUITING

    Erfurt, Thuringia, 99089, Germany

  • European Radiosurgery Center Munich

    RECRUITING

    Munich, Hesse, 81377, Germany

  • Saphir Radiosurgery Center Frankfurt am Main

    RECRUITING

    Frankfurt am Main, Hesse, 60528, Germany

  • Saphir Radiosurgery Center Norther Germany

    ACTIVE_NOT_RECRUITING

    Kiel, Schleswig-Holstein, 24105, Germany

  • University Hospital Frankfurt

    SUSPENDED

    Frankfurt am Main, Hesse, 60528, Germany

  • University Medical Center Schleswig-Holstein

    RECRUITING

    Kiel, Schleswig-Holstein, 24105, Germany

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