title: Rheumatoid arthritis and IgA nephropathy.
abstract: We describe four patients with seropositive rheumatoid arthritis who developed proteinuria and microscopic haematuria. Renal biopsy demonstrated a mesangial proliferative glomerulonephritis with mesangial deposits of IgA. These data suggest a possible causal relationship between rheumatoid arthritis and IgA nephropathy.
mesh_terms: D000328:Adult; D001172:Arthritis, Rheumatoid / Q000150:complications* / Q000473:pathology; D001706:Biopsy; D005922:Glomerulonephritis, IGA / Q000150:complications* / Q000473:pathology; D006801:Humans; D007678:Kidney Glomerulus / Q000473:pathology; D008297:Male; D008875:Middle Aged