The association of the IL-17F (A7488G) polymorphism with susceptibility to the disease was reported, e.g. for the development of asthma (Kawaguchi et al. 2006; Qian et al. 2012), IBD (Arisawa et al. 2008; Seiderer et al. 2008), autoimmune thyroid diseases (Yan et al. 2012) and the most recently with MS (Wang et al. 2014) and acute myeloid leukaemia (Wróbel et al. 2014). This evidence concerns the gene IL17F and inflammatory bowel disease.