Thirty years since its discovery, IgA nephropathy (IgAN) has turned ou
t to be the commonest primary glomerulonephritis around the world. The
major presenting symptom is haematuria, with or without proteinuria.
IgAN was initially considered a benign disease, but long-term follow-u
p studies have shown the course to be slowly progressive with up to 50
% of the patients developing terminal renal failure after several deca
des. The aetiology and pathogenesis are still unclear, but IgAN seems
to be associated with a dysregulation of the immune response which is
not very well understood. There is today no specific treatment. Effect
ive blood pressure control is the cornerstone of therapy.