Antibiotic therapy depends on the suspected cause
Pyelonephritis (enterobacteriaceae):  third generation cephalosporin + quinolone
Hematogenous (staphylococcus)): vancomycin
Known to be colonized by ESBL: carbapenem
Abscess drainage
Abscess of ANY size requires IR for percutaneous drainage
If any urological obstruction is suspected (nephrolithiasis, ureterolithiasis, external compression from abdominal cavity, presence of pre-existing ureteral stent), emergent urological consultation should be obtained
Pyelonephritis (enterobacteriaceae):  third generation cephalosporin + quinolone
Hematogenous (staphylococcus)): vancomycin
Known to be colonized by ESBL: carbapenem
Abscess of ANY size requires IR for percutaneous drainage
If any urological obstruction is suspected (nephrolithiasis, ureterolithiasis, external compression from abdominal cavity, presence of pre-existing ureteral stent), emergent urological consultation should be obtained
Perinephric abscess
Genitourinary infection
Renal abscess
Acute cystitis 
Psoas abscess
Pyelonephritis
Traumatic epididymitis
Urethritis