Management of Ureteral Stones with Hydronephrosis

Stone Size and Location Considerations

For ureteral stones <10mm with controlled symptoms, conservative management with medical expulsive therapy is appropriate as initial treatment, according to the American College of Radiology 4
Patients with moderate to severe hydronephrosis are at higher risk of stone passage failure and may require closer monitoring, as indicated by the American College of Radiology 1, 3, 5

Periodic imaging to monitor stone position and assess hydronephrosis is recommended, as suggested by Praxis Medical Insights 4
Urgent urological evaluation is needed if any of the following develop: evidence of urinary tract infection, intractable pain, or worsening obstruction, according to Praxis Medical Insights 6
Patients should be counseled that if the stone does not pass within 28 days or symptoms worsen, urological intervention may be required, as recommended by Praxis Medical Insights 4

The presence of hydronephrosis indicates this stone is causing obstruction, which changes the risk-benefit calculation, as noted by the American College of Radiology 1, 3

Do not assume all 4mm stones will pass spontaneously—the presence of hydronephrosis indicates higher risk of passage failure, as indicated by the American College of Radiology 1, 3
Do not delay urological referral if infection is suspected—untreated bacteriuria with obstruction can lead to urosepsis, according to Praxis Medical Insights 4