PDGFRA and gastrointestinal stromal tumor: Most IFPs bear PDGFRA mutations.1, 2 A subset of GI stromal tumours (GISTs), accounting for 6%‐7% of the total, also harbours PDGFRA mutations, similar to IFPs.3 This GIST subgroup, which manifests a strong predilection for the stomach, is frequently at least partly epithelioid and, unlike other GISTs, is often negative or only faintly/patchy positive for CD117.