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Updated: Aug 21, 2026

Robotic Duodenal Sleeve Resection for Gastrointestinal Stromal Tumor with Rare Exon 8 KIT Mutation Following Neoadjuvant Imatinib
Published on: April 3, 2026
Imatinib and gastrointestinal stromal tumor (GIST): a selective targeted therapy
1Department of Gastroenterology and Hepatology, University Hospital La Fe, Valencia, Spain. afvillaverde@hotmail.com
Abstract:
Gastrointestinal stromal tumors are the most frequent mesenchymal tumors in the gastrointestinal tract. They originate from the interstitial cells of Cajal and are characterized by an anomalous receptor for a growth factor with tyrosine-kinase activity (c-kit). This anomaly causes a permanent activation of the receptor and uncontrolled cell growth. These tumors show a poor response to traditional chemotherapy drugs, and are thus associated with low survival in cases of advanced disease. Imatinib, a tyrosine kinase inhibitor, is an example of selective targeted oncologic therapy that induces improved survival in these patients. We discuss two cases of metastatic gastrointestinal stromal tumors with a good response to imatinib, and also review the pathophysiology and treatment-related outcome of this type of tumors. We include results from clinical phase-III studies.
Insights
Gastrointestinal stromal tumors (GISTs) are frequent mesenchymal tumors. Targeted therapy with imatinib significantly improves survival in advanced GIST cases, offering a better prognosis.
Area of Science:
- Oncology
- Gastroenterology
- Molecular Biology
Background:
- Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumors of the GI tract.
- GISTs arise from interstitial cells of Cajal, driven by c-kit receptor anomalies.
- Poor response to conventional chemotherapy leads to low survival rates in advanced GIST.
Observation:
- Two cases of metastatic GIST demonstrated a positive response to imatinib therapy.
- Imatinib, a tyrosine kinase inhibitor, represents a targeted oncologic therapy.
- Clinical phase-III study results are incorporated into the review.
Findings:
- Imatinib induces improved survival in patients with GIST.
- Selective targeted therapy shows efficacy in advanced metastatic GIST.
- Understanding GIST pathophysiology is crucial for treatment outcomes.
Implications:
- Targeted therapies like imatinib offer new hope for GIST patients.
- Further research into GIST pathophysiology can optimize treatment strategies.
- Improved survival rates are achievable with advanced targeted treatments.
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