Abstract
Data are given on a 33-year-old woman with a probable post-streptococcal rapidly progressing proliferative glomerulonephritis. Earlier she had also had an attack of acute pyelonephritis. While on immunosuppressive treatment with azathioprine and prednisolone she developed multiple renal abscesses without signs of infection such as bacteriuria or increased numbers of white blood-cells in the urine sediment.