Association of TNF-α polymorphism rs1800629 with multisomatoform disorder in a group of German patients and healthy controls: An explorative study

► Nine cytokine polymorphisms were genotyped and statistically analyzed for associations with MSD. ► Groups of 148 patients and 149 age and gender matched healthy controls participated in this study. ► Significant allelic and genotypic associations were found for rs1800629 (TNFα). ► Being carrier of the rs1800629 A-allele seems to be a risk factor for MSD.