IgA glomerulonephritis (IgAGN) is one of the most common forms of primary glomerulonephritis worldwide, accounting for 25-50 % of all patients with primary glomerulopathy. The hallmark for diagnosis is the deposition of immunoglobulin A (IgA) in the glomerular mesangium, leading to histological damage of various degrees. A broad spectrum of clinical presentation and variable prognosis is typical for the disease and approximately 25-30 % of patients eventually develop end-stage renaldisease (ESRD).After the description of the disease in the late 1960s a considerable body of information has...