Résumé
Objective To analyse the incidence, clinical features, histopathology and clinicopathological correlation in different age group of 524 cases with IgA nephropathy(IgAN) retrospectively. Methods 524 cases of IgA nephropathy were divided into three groups according to their age, and the clinical and renal pathological features were analyzed. Results In children group(≤15 years), the incidence of recurrent gross hematuria was 47. 2% and renal impairment 4. 6%. Malignant hypertension as first presentation associated with serious renal impairment occured in 3. 8% patients of youth and adult group (16 - 49 years). Higher incidence of nephrotic syndrome and acute renal failure was found in elder group (50 - 69 years). Conclusions The incidence Of IgAN in children and elder population is increased, especially in the children. They need a further follow-up. For elder patients considered as IgAN, a renal biopsy seems to be necessary. While youths and adults still account for the most part of IgAN patients.