The clinical charateristics of these cases were as followed: time from the first manifestation to renal biopsy 32 ± 47 months (0.5 - 216), serum creatinine 0.92 ± 0.27 mg / dl (0.5 - 1.7), proteinuria 0.94 ± 0.91 g/24h (0 - 3.5) and serum IgA 270 ± 161 mg / dl (50 - 860).