Related Experiment Video
Updated: Jun 20, 2026

Robotic Duodenal Sleeve Resection for Gastrointestinal Stromal Tumor with Rare Exon 8 KIT Mutation Following Neoadjuvant Imatinib
Published on: April 3, 2026
[Imaging procedures for gastrointestinal stromal tumors].
G Antoch1, K Herrmann, T A Heusner
1Institut für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Essen, Universität Duisburg-Essen, Hufelandstrasse 55, Essen, Germany. gerald.antoch@uni-due.de
Functional imaging like FDG-PET offers early assessment of gastrointestinal stromal tumor (GIST) therapy response, outperforming morphological imaging by detecting metabolic changes within 24 hours. New density-based criteria also improve GIST response evaluation.
Area of Science:
- Oncology
- Radiology
- Medical Imaging
Context:
- Gastrointestinal stromal tumors (GIST) require accurate staging and therapy response monitoring.
- Current guidelines recommend computed tomography (CT) for morphological assessment of GIST.
- Limitations exist in early therapy response evaluation using size-based morphological imaging.
Purpose:
- To review the indications and accuracy of morphological and functional imaging for GIST.
- To compare the efficacy of computed tomography (CT) and positron emission tomography (PET) in GIST management.
- To highlight the advantages of functional imaging in early therapy response assessment for GIST patients.
Summary:
- Computed tomography (CT) is standard for GIST staging, but positron emission tomography (PET) with [(18)F]-2-fluoro-2-deoxy-D-glucose (FDG-PET) provides earlier therapy response assessment.
- FDG-PET detects metabolic changes (decreased uptake) within 24 hours of therapy initiation, unlike size-based CT.
- New density-based criteria are being developed to enhance GIST therapy response assessment beyond size reduction.
Impact:
- FDG-PET enables quicker therapeutic adjustments for GIST patients.
- Improved imaging accuracy can lead to more personalized and effective GIST treatment strategies.
- This review provides a comprehensive overview for clinicians utilizing imaging in GIST patient care.
Related Concept Videos
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and solid...
Imaging Studies II: Positron Emission Tomography and Scintigraphy
Fundamental Principles of PET
Imaging Studies I: CT and MRI
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Radiological Investigation III: Pulmonary Angiogram and PET Scan
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Ultrasound II: Endoscopic Ultrasound and FibroScan
Endoscopic Ultrasound (EUS):
Imaging Studies III: Computed Tomography