Clinical criteria for diagnosis, as defined in 2006 by the European League Against Rheumatism and the Pediatric Rheumatology European Society, requires palpable purpura along with one of the following: predominant IgA deposition on biopsy, arthritis or arthralgia, renal involvement (hematuria/proteinuria), or abdominal pain [4]. This evidence concerns the gene CD79A and arthritic joint disease.