Ureteral / Kidney Stone
Understanding Ureteral / Kidney Stone found on Flank / Urinary Tract Computed Tomography imaging. Learn what this finding means and what steps to take next.
Radiographic Appearance
Computed Tomography FindingHigh-attenuation calculus along collecting system with upstream hydronephrosis or hydroureter.
Clinical Significance
Causes renal colic and potential obstruction; larger stones may need intervention.
What is a Kidney Stone?
Solid mineral deposit forming in the kidney that can obstruct urine flow. Non-contrast CT is first-line for suspected renal colic.
Imaging Appearance
- Hyperdense focus in kidney, ureter, or UVJ
- Secondary signs: hydronephrosis, peri-ureteral stranding
- Measure size: ＜5 mm often passes; ＞10 mm less likely
Clinical Significance
- Obstruction can impair renal function
- Infection plus obstruction is an emergency
Symptoms
- Sudden severe flank pain radiating to groin
- Hematuria, nausea/vomiting
Diagnosis
- Non-contrast CT (stone protocol)
- Ultrasound as radiation-sparing alternative in pregnancy
- Labs: creatinine/BUN for renal function; electrolytes for dehydration
Treatment
- Pain control, hydration, medical expulsive therapy for small stones
- Urology consult for lithotripsy, ureteroscopy, or stent if large/obstructing
Prognosis
- Most small stones pass; recurrence common—needs prevention plan
What Should You Do?
- Strain urine to collect stone for analysis.
- Maintain hydration; follow urology advice.
- Seek urgent care if fever, chills, or uncontrolled pain.
Medical Disclaimer: Educational only; follow your clinician’s guidance.
Correlate with Lab Results
Doctors often check these blood tests when Ureteral / Kidney Stone is found on imaging:
Related Imaging Terms
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