In tumor samples gene expression analysis showed no significant variation between WT and heterozygous KIT mutated tumors, with a high inner variability in ANXA8, FBN1, GALNTL4, MFAP5 and RABEP1 expression, which was partly reduced by separating exon 9 and exon 11 mutated tumors. Here, FBN1 is linked to neoplasm.