Fig. 4From: ALK expressed in a gastrointestinal stromal tumor harboring PDGFRA p. D842V mutation:a case reportSanger sequencing detected a c.2525A > T, p.D842V mutation at exon 18 of PDGFRA for the GIST in this case. Panel a displays the forward sequencing result, and Panel b reveals the reverse sequencing resultBack to article page