NCT07134296

Magnetic Resonance Imaging (MRI)-Guided Rectal Cancer Preservation Program

MRI-guided Rectal Cancer Preservation Program

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 32 (estimated)
• Sponsor: Clinica Universidad de Navarra, Universidad de Navarra · Academic / Other
• Sex: All
• Age: 18 Years – 80 Years
• Healthy volunteers: Not accepted

Summary

The goal of this clinical trial is to learn if the use of MRI-guided irradiation increases the rates of rectal preservation

Detailed description

HYPOTHESIS The implementation of Magnetic Resonance Image Guided Radiotherapy (MRgRT) into a TNT Program renders improved TME-free rates due to the better visualization and online dose-adaptation of the Gross Tumor Volume (GTV). Rationale In the radiation setting, MRI provides superior soft tissue contrast compared to standard onboard X-ray imaging improving inter- and intra- observer delineation variation. MRgRT offers the opportunity to adapt the plan at each fraction to the anatomical changes seen. This is especially important in rectal cancer where the rectum is subject to interfractional position changes, volume shrinkage and intrafractional shape and size variation due to the variability in rectal filling. Primary Objectives A. To achieve 3-year TME-free survival of 75% while keeping 3-year DFS rates of 75%. B. To achieve a CTCAE v5 grade 2-3 proctitis of less than 10% and grade 2-3 rectal bleeding rate of \<2% at 2 years. C. To achieve a Wexner Continence score of at least 90% over baseline at 2 years. Secondary Objectives A. Determination of blood and urine biomarkers of treatment response and toxicity . B. Determination of radiomics biomarkers of treatment response and toxicity . C. Determination of rectal functionality with the Wexner Continence Score.

Conditions

• Rectal Cancer

Interventions

Type	Name	Description
RADIATION	MR-Guided Irradiation	MR-Guided Irradiation

Timeline

• Start date: 2025-10-01
• Primary completion: 2030-06-30
• Completion: 2030-06-30
• First posted: 2025-08-21
• Last updated: 2025-08-21