These were PDX models harboring primary and secondary <i>KIT</i> and additional mutations; <i>KIT</i> exon 11 (p.Y570_L576del), <i>KIT</i> exon 17 (p.D816E), and <i>PTEN</i> (p.T321fs) mutations in GIST-RX1 from a patient who was unresponsive to imatinib, sunitinib, and sorafenib, and <i>KIT</i> exon 11 (p.K550_splice) and <i>KIT</i> exon 14 (p.T670I) mutations in GIST-RX2 and <i>KIT</i> exon 9 (p.502_503insYA) and <i>KIT</i> exon 17 (p.D820E) mutations in GIST-RX4 from patients with imatinib and imatinib/sunitinib resistance, respectively.
At molecular analysis, there were 4 c-KIT mutations (occurring in exon 11 V559A, L576P, Y553N and exon 17 D820E) in thymic carcinomas (typeC), but not in other tumor types (p=0.003).
In the group of 16 DSD cases a N505I and D820E mutation was found in a single tumor of a patient with gonadoblastoma and dysgerminoma.No PDGFRA mutations were found.
In the group of 16 DSD cases a N505I and D820E mutation was found in a single tumor of a patient with gonadoblastoma and dysgerminoma.No PDGFRA mutations were found.