An abscess of the<unk>  fat that abuts the renal cortex
Can arise as a complication either a pre-existing pyelonephritis (majority) or from hematogenous seeding
E. coli (51.4%)
S. aureus (10%)
"UTI" frequently refers specifically to acute cystitis, but may also be used as a general term for all urinary infections; use location-specific diagnosis.
Renal/perirenal
Pyelonephritis
Emphysematous pyelonephritis
Renal abscess<unk> 
Ureteral
Infected urolithiasis
Bladder
Acute cystitis ("UTI")
Chronic cystitis
Urethra/periurethra
Urethritis
Prostatitis
Pyelonephritis
Emphysematous pyelonephritis
Renal abscess<unk> 
Emphysematous pyelonephritis
Infected urolithiasis
Acute cystitis ("UTI")
Chronic cystitis
Urethritis
Prostatitis
Perinephric abscess
Genitourinary infection
Renal abscess
Acute cystitis 
Psoas abscess
Pyelonephritis
Traumatic epididymitis
Urethritis