CD79A and kidney disorder: There were also no apparent demographic features (patient age and sex, time posttransplantation of biopsy) that distinguished recurrent from de novo IgAN, although the fractions of biopsies with glomerular IgA deposits and unknown native kidney disease that showed rejection and that were performed for proteinuria (Table 1) suggest that most of these biopsies had de novo rather than recurrent IgAN.