Other common symptoms, such as lymphadenopathy and hepato-splenomegaly, or specific symptoms, such as retroperitoneal fibrosis (SLC29A3-associated histiocytosis-lymphadenopathy–plus syndrome) or sideroblastic anemia (TRNT1-associated sideroblastic anemia with B-cell immunodeficiency, periodic fever, and developmental delay), were also reported. Here, SLC29A3 is linked to IgG4-related retroperitoneal fibrosis.