According to the European League Against Rheumatism/Pediatric Rheumatology International Trials Organization/Pediatric Rheumatology European Society (EULAR/PRINTO/PRES) classification criteria, the diagnoses of HSP confirmed by the presence of purpura and one of the following manifestations: abdominal pain, arthralgia, renal insufficiency, and leukocytoclastic vasculitis with predominant IgA deposits [1]. The gene discussed is CD79A; the disease is purpura.