PDGFRA and gastrointestinal stromal tumor: In a recent study, the concomitant occurrence of BRAF/KIT and BRAF/PDGFRA mutations in GISTs is confirmed by using a quantitative competitive allele-specific Taq-Man duplex polymerase chain reaction.139Accordingly, two spindle cell phenotype GIST cases harboring novel BRAF fusion genes arising in two young–adult women in the small bowel and esophagus have been reported.