Other associated conditions included STAT5A-associated chronic eosinophilic leukemia (n=1, 2%), lymphocytic (n=2, 4%), idiopathic (n=13, 23%), reactive (n=5, 7% including three drug adverse reactions and two parasitosis) HES as well as overlapping diseases (n=4, 7%, consisting of polyarteritis nodosa, IgG4-related disease, sclerosing cholangitis and eosinophilic fasciitis, a single patient each). This evidence concerns the gene STAT5A and immunoglobulin G4-related sclerosing disease.