Sterile pyuria differential diagnosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Sadaf Sharfaei M.D.[2]

Pyuria Differential Diagnosis

Differentiating the diseases that can cause sterile pyuria:[1][2][3][4]

To review differential diagnosis of pyuria, click here.

Category Disease Clinical manifestations Para−clinical findings Gold standard for diagnosis Associated findings
Symptoms Physical examination
Lab Findings Imaging
Pain Fever N/V Urinary symptoms BP Other CBC Electrolytes Urinalysis
Dysuria Frequency Urgency Gross hematuria Cell Cast Bacteriuria Culture Other
Infectious diseases UTI[5] Viral[6][7] + + + + ± Nl Nl Nl + NA NA PCR viral load
Tuberculosis[8][9][10][11] ± + + + + Nl Nl Nl ± Positive mycobacterial urine culture Pulmonary TB on chest CT Urine mycobacterial PCR
Fungal[12][13] + + Nl Nl Nl ± + after several weeks of follow up NA Hydronephrosis on ultrasound Urine culture
  • Increased risk in patients with long−term foley catheters
  • Candida as the most prevalent fungus
STD Chlamydia[14][15] Chronic pelvic pain + + Nl Nl Nl + + NA NA PCR
  • Females might have concurrent chlamydial cervicitis
  • Must be considered in young, sexually active males
Gonococcus[16][17][18] Chronic pelvic pain + + Nl Nl Nl + +

High false negative result

NA Nucleic acid amplification testing (NAAT)
  • Females might have concurrent cervical gonococcal infection
  • Must be considered in young, sexually active males
Ureaplasma urealyticum[19] + + Nl Nl Nl +
  • Gram stain −
NA PCR
  • Associated with complications of pregnancy
Herpes simplex virus[20] + + + + Nl Nl Nl + Viral culture + NA NA Clinical manifestation + PCR
  • Associated with extragenital complications, like aseptic meningitis
  • High risk of recurrence 
Herpes zoster[21] + + Nl Nl Nl + NA Clinical manifestation + PCR
  • Associated with lumbosacral dermatome involvement
HPV[22] + Nl Nl Nl + NA NA Clinical manifestation + PCR
HIV[23] + + + + Nl Nl + NA NA Combination antigen/antibody immunoassay + PCR HIV viral load test
Appendicitis[24][25] Right lower abdominal pain + + + + + Nl Nl + Enlarged appendiceal diameter on CT scan or ultrasound Clinical manifestation NA
Category Disease Pain Fever N/V Dysuria Frequency Urgency Gross hematuria BP Other PE CBC Electrolytes Cell Cast Bacteriuria Culture Other UA findings Imaging Gold standard for diagnosis Associated findings
Non−infectious diseases Urinary tract disorders Urinary tract stone[26][27] Colicky pain + + + + ± Nl Nl Nl + Visible stone on CT scan Clinical manifestation
  • Might cause renal obstruction
Urinary tract neoplasm[28] + + + + + + + Nl Nl Nl + Visible tumor on CT scan Cystoscopy  + biopsy
Urinary fistula[29] + + Nl Nl Nl + NA Fistula on cystoscopy or IVP Physical examination
  • History of recent surgery
Interstitial cystitis[30] Chronic bladder pain + + + Nl Nl Nl + NA NA Clinical manifestation Associated with other chronic pain syndromes
Vesicoureteral reflux[31] + + Nl Nl Nl + Imaging
Hydronephrosis[32] + Nl Nl Nl + Imaging
Renal diseases Polycystic kidney disease[33]  Flank or back pain + + + Nl Nl + Multiple cysts on ultrasound Imaging
Renal vein thrombosis[34] Flank pain + + + + + + Nl or ↑ + Thrombosis on CT scan Renal venography
Interstitial nephritis[35] Lower back pain + + Nl or ↑ + + Nl Clinical manifestation + urinalysis
IgA nephropathy[36] + Nl or ↑
  • Might be asymptomatic
Nl Nl + Nl Biopsy
Renal transplant rejection[37] Flank pain + + + + + + Nl + + Increased graft size on ultrasound Renal allograft biopsy
Disease Pain Fever N/V Dysuria Frequency Urgency Gross hematuria BP Other PE CBC Electrolytes Cell Cast Bacteriuria Culture Other UA findings Imaging Gold standard for diagnosis Associated findings
Systemic disease Diabetic nephropathy[38] ±
  • Might be asymptomatic
Nl Nl + Nl Clinical manifestation + laboratory tests
Lupus nephritis[39] + + + + + Nl + + Enlarged kidneys on CT scan Biopsy
  •  Abnormal results of specific serologic tests
Sjögren’s syndrome[40] + + Nl + + Abnormal diffuse fat tissue deposition and diffuse punctate calcification on parotid gland CT scan Clinical manifestation + laboratory tests
  •  Abnormal results of specific serologic tests
Kawasaki's disease[41] + + + + Nl + Vessels involvement on angiography Clinical manifestation Associated with multiple organ involvement including heart
Medication/toxin Analgesic nephropathy[42] Flank pain + + + + + + + + Renal impairment on CT scan Imaging
Contrast−induced nephropathy[43] + + + Nl Nl + + NA Clinical manifestation + exclusion of other causes of AKI
Category Disease Pain Fever N/V Dysuria Frequency Urgency Gross hematuria BP Other PE CBC Electrolytes Cell Cast Bacteriuria Culture Other UA findings Imaging Gold standard for diagnosis Associated findings
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