title: Dextranomer/hyaluronic acid copolymer implant calcification mimicking distal ureteral calculi on ultrasound.
abstract: We report 2 patients with a history of vesicoureteral reflux who were treated with intraureteral and/or subtrigonal injection of dextranomer/hyaluronic acid copolymer; they later developed calcification within the region of injection, as seen on ultrasound, which mimicked ureterovesical junction calculi. The radiologist reporting the studies suggested the presence of a distal ureteric calculus in the first case and a distal ureteric calcification in the second case. The ultrasound findings were incidental with no hydronephrosis and both patients were asymptomatic without hematuria. Follow-up ultrasound studies remained unchanged. Calcification of dextranomer/hyaluronic acid copolymer implants may mimic distal ureteral calculi, and careful initial observation is recommended.
authors.affiliation: Division of Paediatric Urology, Children's Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ontario, Canada. atdclark@gmail.com
authors.forename: Aaron T D
authors.initials: AT
authors.lastname: Clark
authors.forename: Luis
authors.initials: L
authors.lastname: Guerra
authors.forename: Michael
authors.initials: M
authors.lastname: Leonard
mesh_terms: D002114:Calcinosis / Q000000981:diagnostic imaging* / Q000209:etiology*; D002648:Child; D003911:Dextrans / Q000009:adverse effects*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006820:Hyaluronic Acid / Q000009:adverse effects*; D014463:Ultrasonography; D014514:Ureteral Calculi / Q000000981:diagnostic imaging*
chemical_list: D003911:Dextrans; C487487:dextranomer-hyaluronic acid copolymer; D006820:Hyaluronic Acid