Unilateral hydronephrosis: Symptoms & Signs, Diagnosis & Tests

Symptoms & Signs

  • Flank pain
  • Abdominal mass
  • Nausea and vomiting
  • Urinary tract infection
  • Fever
  • Painful urination (dysuria)
  • Increased urinary frequency
  • Increased urinary urgency

Note: Sometimes unilateral hydronephrosis does not have symptoms.

Diagnosis & Tests

Unilateral hydronephrosis is usually identified with tests such as the following:

  • Abdominal MRI
  • CT scan of the kidneys or abdomen
  • Intravenous pyelogram (IVP)
  • Isotope renography (special scan of the kidneys)
  • Ultrasound of the kidneys or abdomen

Pictures & Images

Female urinary tract


Review Date : 3/22/2010
Reviewed By : Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; Scott Miller, MD, Urologist in private practice in Atlanta, Georgia. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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