Our data did not reveal any differences in clinical or laboratory parameters or histopathological features except for a significantly higher level of proteinuria or proportion of nephrotic syndrome (p < 0.05) at presentation before biopsy in the ANCA-negative group than in the ANCA-positive group,and a lower level of serum albumin (p < 0.05) in the ANCA-negative group than in the ANCA-positive group. Here, ALB is linked to nephrotic syndrome.