The EC decision is applicable to all 27 European Union member states plus Iceland, Norway, and Liechtenstein. In September 2021, QINLOCK was added as a fourth-line treatment for GIST patients progressing or intolerant to imatinib, sunitinib, and regorafenib to the ESMO-EURACAN-GENTURIS clinical practice guidelines for GIST 2. "The European Commission's approval of QINLOCK marks the eighth regulatory approval of this transformative medicine worldwide and is an important milestone for patients with advanced GIST in the EU who are in need of a new treatment option," said Steve Hoerter, President and Chief Executive Officer of Deciphera.