TNFSF13B and Feingold syndrome: In a genome-widemRNA expression profile in FS, BAFF expression was significantly increased inCD4+ T lymphocytes of patients with active disease and decreased in patientsunder immunosuppressive treatment, both compared to healthy individuals, andalso overexpressed in lesional skin compared to non-lesional skin of the samepatients (Malheiros et al.,2014).