Deflux Calcification Leading to Delayed Obstruction and Loss of Renal Function: A Case Report

Area of Science:

• Pediatric Urology
• Biomaterials Science
• Medical Device Complications

Background:

• Dextranomer/hyaluronic acid (Deflux) is a common treatment for pediatric vesicoureteral reflux (VUR).
• It shows good early efficacy and low morbidity.
• While early Deflux complications are known, late complications are less understood.

Observation:

• An 11-year-old female presented with severe, asymptomatic hydroureteronephrosis.
• This condition was identified nearly 8 years after Deflux treatment for VUR.
• The patient had no apparent risk factors for complications.

Findings:

• The case details a rare instance of significant ipsilateral hydroureteronephrosis.
• Severe loss of renal function was observed long after Deflux administration.
• No clear predisposing factors were identified in this patient.

Implications:

• This case underscores the potential for delayed, severe complications following Deflux treatment.
• It suggests the need for long-term monitoring of patients treated with Deflux for VUR.
• Further research is warranted to understand the mechanisms and risk factors for late Deflux-related complications.