Dizbay et al. [12] determined hypocomplementemia, increased levels of polyclonal immunoglobulins (IgG, IgA, and IgE), positivity of rheumatoid factor and P-ANCA in the patients with renal failure, and leukocytoclastic vasculitis due to brucellosis and the authors stated that they thought that this picture was caused by mixed cryoglobulinemia. This evidence concerns the gene CD79A and hypersensitivity vasculitis.