Ultrasound Imaging📍 KidneyUpdated 2025-12-15Radiology Reviewed
Hydronephrosis
Understanding Hydronephrosis found on Kidney Ultrasound Imaging imaging. Learn what this finding means and what steps to take next.
Radiographic Appearance
Ultrasound Imaging FindingDilated renal collecting system with anechoic calyces; cortical thinning in chronic cases.
Clinical Significance
Indicates urinary tract obstruction; severity staging guides urgency.
What is Hydronephrosis?
Urine backup dilating the kidney. Ultrasound is first-line to detect obstruction.
Imaging Appearance
- Pelvicalyceal dilatation
- Ureteral dilation suggests distal obstruction
- Cortex thinning in chronic obstruction
Clinical Significance
- Prolonged obstruction can cause renal damage
- Severity graded (mild/moderate/severe)
Symptoms
- Flank pain, reduced urine, nausea; may be silent if chronic
Diagnosis
- Renal ultrasound; consider Doppler for resistive index
- Labs: creatinine/BUN/potassium for renal function
Treatment
- Relieve obstruction: stone management, catheter/stent, treat strictures
- Address infection promptly
Prognosis
- Good if obstruction relieved early; chronic changes may persist
What Should You Do?
- Seek evaluation if flank pain or rising creatinine.
- Follow up after intervention to confirm resolution.
- Hydrate and follow urology guidance for stone prevention.
Medical Disclaimer: Educational only; follow urology/nephrology advice.
Correlate with Lab Results
Doctors often check these blood tests when Hydronephrosis is found on imaging:
Related Imaging Terms
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