NCT01265979

WB-DWI for Early Prediction of Therapy Response in Patients With Advanced Metastatic GIST Treated With Regorafenib

Whole Body Diffusion-weighted MRI (WB-DWI) for Early Prediction and Evaluation of Therapy Response in Patients With Advanced Metastatic Gastrointestinal Stromal Tumors (GIST) Treated With Regorafenib.

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 5 (actual)
• Sponsor: Universitaire Ziekenhuizen KU Leuven · Academic / Other
• Sex: All
• Age: —
• Healthy volunteers: Not accepted

Summary

The purpose of this study is to evaluate WB DWI as early predictor of response to treatment with regorafenib or placebo in patients with advanced metastatic GIST.

Detailed description

Aim of the study \- To assess whole body diffusion-weighted magnetic resonance imaging (WB-DWI) for the assessment and early prediction of response of treatment with regorafenib or placebo in patients with advanced, metastatic gastro-intestinal stromal tumors (GIST) 1. Evaluation of pretreatment apparent diffusion coefficient (ADC) and b1000 signal intensity (SI) of GIST visualized on the WB-DWI as predictor of time to progression, determined by progression-free survival (PFS) 2. Evaluation of WB-DWI using changes of high b-value SI and ADC early during treatment (2weeks after start of therapy; allowed optimal window 10-14 days) as early predictor of time to progression or patient benefit according to RECIST (stable disease + partial response + complete response) 3. Evaluation of WB-DWI for treatment follow-up 3 months after initiation of treatment. Confirmation of prior published pilot study (Dunet V et al, J Nucl Med 2010) 4. Comparison of WB-DWI with conventional CT imaging for response assessment

Conditions

• Gastrointestinal Stromal Tumors

Interventions

Type	Name	Description
PROCEDURE	Whole body diffusion MRI	These studies will be performed on a 3 Tesla (T) MR system. A major advantage of 3T compared to 1.5T is the improved signal to noise ratio that allows whole-body studies to be faster and without application of external antennas, which greatly improves patient comfort.

Timeline

• Start date: 2011-01-01
• Primary completion: 2011-09-01
• Completion: 2011-09-01
• First posted: 2010-12-23
• Last updated: 2015-04-10

Locations

1 site across 1 country: Belgium