Microsatellite (GT)n is part of the von Willebrand factor (VWF) promoter region that influences the glucocorticoid-induced increase in VWF in Cushing's syndrome

In conclusion, not only the SNPs haplotypes in the VWF gene promoter, but also the variable-length (GT)n locus predict the risk of developing high VWF levels under conditions of glucocorticoid excess; the combination of (GT)S and haplotype 1 represents the susceptible pattern.