Diagnosis

Your primary care doctor may refer you to a doctor who specializes in conditions affecting the urinary system (urologist) for your diagnosis.

Tests for diagnosing hydronephrosis may include:

• A blood test to evaluate kidney function
• A urine test to check for signs of infection or urinary stones that could cause a blockage
• An ultrasound imaging exam, during which your doctor can view the kidneys, bladder and other urinary structures to identify potential problems
• A specialized X-ray of the urinary tract that uses a special dye to outline the kidneys, ureters, bladder and urethra, capturing images before and during urination

If necessary, your doctor may recommend additional imaging exams, such as a CT scan or MRI. Another possibility is a test called a MAG3 scan that evaluates function and drainage in the kidney.