1. Please explain the pathophysiology of ascites in the nephrotic syndrome? 2. Does the nephritic syndrome cause hyperkalaemia? I don’t seem to be able to find a definitive answer in the textbooks that I have consulted. 3. You say that the investigation of first choice for urinary tract infections (UTIs) in males or children, or recurrent UTIs in females, is intravenous urography (IVU); in Oxford Handbook of Clinical Medicine it is ultrasound (US). Which is best?