CASE VIGNETTE:
A 74 year-old woman was admitted to a General Hospital because of cough, haemophtoe, pneumonia and severe renal failure (serum creatinin 5.2 mg/dl). She was treated with antibiotics (amoxicillin + azithromycin); after a week, pneumological conditions improved and she was referred to a Nephrology Unit because of microscopic haematuria and proteinuria (3,8 g/d) and worsening of renal failure (sCr 5.8 mg/dl). Complement, serum immunoglobulins, ENA, antiDNA and protein electrophoresis were normal. Renal biopsy was performed on a morphologically normal kidney.
(photo: courtesy of dr Nicoletta Ravarino, SC Anatomia Patologica Ospedale Mauriziano Torino)
