deltatrials
Terminated NA INTERVENTIONAL 4-arm NCT04827732

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

Hypofractionated Pencil-Beam Scanning Intensity-modulated Proton Therapy (IMPT) in the Reirradiation of Locoregionally Recurrent Rectal Cancer - IMPARC

Sponsor: Washington University School of Medicine

Conditions Recurrent Rectal Cancer
Interventions Hypofractionated Pencil-Beam Scanning Intensity-modulated Proton Therapy MEVION S250i Hyperscan and Adaptive Aperture Proton Therapy Machine
Updated 15 times since 2021 Last updated: Sep 15, 2025 Started: May 4, 2021 Primary completion: Jul 29, 2024 Completion: Nov 18, 2024
This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

Terminated

Slow enrollment

Other terminated trials from Washington University School of Medicine

See all terminations from Washington University School of Medicine

This NA trial investigates Recurrent Rectal Cancer and is currently terminated or withdrawn. Washington University School of Medicine leads this study, which shows 15 recorded versions since 2021 — indicating substantial longitudinal coverage. As an oncology study, it adds to the longitudinal record of treatment development for this indication.

Status Flow

~May 2021 – ~Jun 2021 · 31 days · monthly snapshot~Jun 2021 – ~Sep 2021 · 3 months · monthly snapshot~Sep 2021 – ~Dec 2021 · 3 months · monthly snapshot~Dec 2021 – ~Jan 2023 · 13 months · monthly snapshot~Jan 2023 – ~Mar 2023 · 59 days · monthly snapshot~Mar 2023 – ~Jun 2023 · 3 months · monthly snapshot~Jun 2023 – ~Sep 2023 · 3 months · monthly snapshot~Sep 2023 – ~Jun 2024 · 9 months · monthly snapshot~Jun 2024 – ~Jul 2024 · 30 days · monthly snapshot~Jul 2024 – ~Sep 2024 · 2 months · monthly snapshot~Sep 2024 – ~Feb 2025 · 5 months · monthly snapshot~Feb 2025 – ~Mar 2025 · 28 days · monthly snapshot~Mar 2025 – ~Sep 2025 · 6 months · monthly snapshot~Sep 2025 – ~Oct 2025 · 30 days · monthly snapshot~Oct 2025 – present · 9 months · monthly snapshot

Change History

15 versions recorded

  1. Oct 2025 — Present [monthly]

    Terminated NA

  2. Sep 2025 — Oct 2025 [monthly]

    Terminated NA

  3. Mar 2025 — Sep 2025 [monthly]

    Terminated NA

    Status: Recruiting → Terminated

  4. Feb 2025 — Mar 2025 [monthly]

    Recruiting NA

  5. Sep 2024 — Feb 2025 [monthly]

    Recruiting NA

▶ Show 10 earlier versions

  1. Jul 2024 — Sep 2024 [monthly]

    Recruiting NA

  2. Jun 2024 — Jul 2024 [monthly]

    Recruiting NA

  3. Sep 2023 — Jun 2024 [monthly]

    Recruiting NA

  4. Jun 2023 — Sep 2023 [monthly]

    Recruiting NA

  5. Mar 2023 — Jun 2023 [monthly]

    Recruiting NA

  6. Jan 2023 — Mar 2023 [monthly]

    Recruiting NA

  7. Dec 2021 — Jan 2023 [monthly]

    Recruiting NA

  8. Sep 2021 — Dec 2021 [monthly]

    Recruiting NA

  9. Jun 2021 — Sep 2021 [monthly]

    Recruiting NA

    Status: Not Yet Recruiting → Recruiting

  10. May 2021 — Jun 2021 [monthly]

    Not Yet Recruiting NA

    First recorded

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:
  • Washington University School of Medicine
Data source: Washington University School of Medicine

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations