Figure 4From: qPCR in gastrointestinal stromal tumors: Evaluation of reference genes and expression analysis of KIT and the alternative receptor tyrosine kinases FLT3, CSF1-R, PDGFRB, MET and AXLImmunohistochemical staining for CD117 in wild type and mutant GIST. a) NF1 associated wild type GIST located in the small intestine with corresponding normal mucosa (*) and muscularis propria (**). b) GIST located in the stomach with a mutation in exon 11 of the KIT gene with corresponding normal mucosa (*).Back to article page