# Hypofractionated Pencil-Beam Scanning Intensity-modulated Proton Therapy (IMPT) in Recurrent Rectal Cancer

> **NCT04827732** · NA · TERMINATED · sponsor: **Washington University School of Medicine** · enrollment: 15 (actual)

## Conditions studied

- Recurrent Rectal Cancer

## Interventions

- **RADIATION:** Hypofractionated Pencil-Beam Scanning Intensity-modulated Proton Therapy
- **DEVICE:** MEVION S250i Hyperscan and Adaptive Aperture Proton Therapy Machine

## Key facts

- **NCT ID:** NCT04827732
- **Lead sponsor:** Washington University School of Medicine
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** TERMINATED
- **Start date:** 2021-05-04
- **Primary completion:** 2024-07-29
- **Final completion:** 2024-11-18
- **Target enrollment:** 15 (ACTUAL)
- **Why stopped:** Slow enrollment
- **Last updated:** 2025-09-29


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04827732

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04827732, "Hypofractionated Pencil-Beam Scanning Intensity-modulated Proton Therapy (IMPT) in Recurrent Rectal Cancer". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT04827732. Licensed CC0.

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