Spontaneous remission of nephrotic syndrome in a patient with IgA nephropathy.

A patient with spontaneous remission of nephrotic syndrome (NS) associated with IgA nephropathy is described. The patient presented at the age of 8 years with asymptomatic proteinuria, and at the age of 11 years developed classical features of NS. A percutaneous renal biopsy showed mild mesangial prominence without significant hypercellularity, electron-dense deposits within the mesangium, and 3+ mesangial staining with IgA and IgG. NS resolved 6 weeks after onset without any form of therapy; absence of proteinuria persisted 6 months later. This report demonstrates clearly that patients with NS associated with IgA nephropathy may undergo spontaneous resolution of their proteinuria.