title: Dextranomer/hyaluronic acid copolymer (Deflux) implants mimicking distal ureteral calculi on CT.
abstract: Periureteral or subtrigonal injection of dextranomer/hyaluronic acid (Dx/HA) copolymer (Deflux, Q-Med, Uppsala, Sweden) is an increasingly common endoscopic treatment for vesicoureteral reflux. We report a confusing radiographic finding of bilateral calcified Dx/HA injections initially thought to represent bilateral distal ureteral stones in a boy who presented with intermittent periumbilical pain. Urologists, radiologists, and emergency room physicians should be aware of the potential for calcification of ureteral implants of Dx/HA, and of the potentially confusing radiographic images that may result.
authors.affiliation: Department of Urology, Children's Hospital Boston, Boston, MA, USA.
authors.forename: Caleb P
authors.initials: CP
authors.lastname: Nelson
authors.forename: Jeanne S
authors.initials: JS
authors.lastname: Chow
mesh_terms: D015746:Abdominal Pain / Q000000981:diagnostic imaging* / Q000209:etiology*; D002648:Child; D003911:Dextrans / Q000008:administration & dosage / Q000009:adverse effects*; D003937:Diagnosis, Differential; D006801:Humans; D006820:Hyaluronic Acid / Q000008:administration & dosage / Q000009:adverse effects*; D008297:Male; D019736:Prostheses and Implants; D014057:Tomography, X-Ray Computed; D014514:Ureteral Calculi / Q000000981:diagnostic imaging; D014718:Vesico-Ureteral Reflux / Q000188:drug therapy*
chemical_list: D003911:Dextrans; D006820:Hyaluronic Acid