A closer look at the clinical-pathological findings reveals that eight of the nine TP53 mutated GIST were suitable for mutation analysis of KIT and PDGFRA. Four cases harbored a KIT exon 11, one sample a KIT exon 13, one case a PDGFRA mutation and one showed a wildtype status for the two genes. Here, PDGFRA is linked to gastrointestinal stromal tumor.