On the other hand, in patient NCCS-GIST-03, ctDNA identified KIT exon 17 c.2467T>G on top of the known exon 11 c.1653_1670del mutation—this patient had prior imatinib-resistant GIST (no molecular evaluation done apart from time of diagnosis) and was progressing despite the 4th-line treatment with pazopanib. Here, KIT is linked to gastrointestinal stromal tumor.