# Pencil Beam Proton Therapy for Pelvic Recurrences in Rectal Cancer Patients Previously Treated With Radiotherapy

Source: https://onco.cc/trials/nct04695782/  
OnCo record `nct04695782` (Trial). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

A phase 2 trial in colorectal cancer, run by University of Aarhus, now recruiting.

## Summary

Pencil Beam Proton Therapy for Pelvic Recurrences in Rectal Cancer Patients Previously Treated With Radiotherapy is a phase 2, interventional study registered as NCT04695782 by University of Aarhus, with a registry enrolment figure of 65 participants, started 2020-10-10 and due to reach its primary completion in 2025-10-31. Interventions recorded: Pencil beam proton radiotherapy. Conditions listed: Rectal Cancer Recurrent. Primary outcome: R0-resection; 1-year local control. Colorectal eligibility wording from the registry: "* • Locally recurrent rectal cancer". Sites: Denmark. No results are recorded here; the registry entry is the source.

## Fields

- Kind: Trial
- Status: recruiting
- Last checked: 2026-09-24
- Also known as: ReRad II
- Tags: ctgov-ingest; colorectal-deep-dive
- Registry id: NCT04695782
- Phase: 2
- Setting: Pencil Beam Proton Therapy for Pelvic Recurrences in Rectal Cancer Patients Previously Treated With Radiotherapy
- Sponsor: University of Aarhus
- Enrolled: 65

## Sources

- ClinicalTrials.gov NCT04695782: https://clinicaltrials.gov/study/NCT04695782

## Connected records

- cancers: [Rectal cancer](https://onco.cc/cancers/rectal-cancer/)
- technologies: [IMRT / IGRT (modern external beam)](https://onco.cc/technologies/imrt-igrt/)
- terms: [Colorectal cancer trials open today (registry snapshot)](https://onco.cc/terms/colorectal-trials-open-today/)

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JSON: https://onco.cc/api/v1/entities/nct04695782.json