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Abstract
This article critically revisits novel data on tyrosine kinase inhibitors that have shown clinical activity in the treatment of gastrointestinal stromal tumor (GIST). GIST therapeutic development exploits the oncogene addiction to KIT or PDGFRA receptor tyrosine kinases. Based on this principle, two new drugs were approved in 2020: ripretinib in GIST patients after progression to all standard treatments and avapritinib, the first agent ever active in the multiresistant PDGFRA D842V-mutant GIST. Additionally, cabozantinib has also shown encouraging activity in imatinib-resistant GIST patients. Finally, novel agents targeting NTRK-driven GIST have emerged as a breakthrough for the treatment of a subset of KIT/PDGFRA wild-type GIST patients. GIST is a paradigmatic tumor model for the rational and successful development of molecularly targeted agents directed against driver mutations in cancer.
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