A<unk> , or<unk> , is an<unk>  that can happen anywhere along the<unk><unk> .<unk> s have different names, depending on what part of the<unk><unk>  is infected.
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Bladder -- an<unk>  in the bladder is also called cystitis or a bladder<unk> 
Kidneys -- an<unk>  of one or both kidneys is called pyelonephritis or a kidney<unk> 
Ureters -- the tubes that take urine from each kidney to the bladder are only rarely the site of<unk> 
Urethra -- an<unk>  of the tube that empties urine from the bladder to the outside is called urethritis
Urinary tract infection
Asymptomatic bacteriuria
Pyelonephritis
Obstructive uropathy
Pyonephrosis
Hemorrhagic cystitis
Urethritis
Hydronephrosis