**3.2. PDGFRA-mutant GIST**

About 5–10% of GISTs have PDGFRA mutations which have a tendency for localized gastric GIST and epithelioid type [4]. The most common type of mutation is the PDGFRA exon 18 mutation D842V, which is associated with imatinib resistance and has a lower risk of recurrence than GIST with KIT mutations as well as a more benign course 9 [34].
