title: Ethanolamine oleate vs. absolute ethanol as sclerosing agents for treating symptomatic simple renal cysts.
abstract: OBJECTIVE
  To compare the efficacy and safety of ethanolamine oleate (EO) as a sclerosing agent, vs. absolute ethanol (AE), in the treatment of symptomatic simple renal cysts.
  
  
  METHODS
  Between November 2009 and October 2012, 46 patients were prospectively randomised into two groups. All patients presented with a simple renal cyst underwent ultrasonographic aspiration and injection of a sclerosing agent. In group 1, 25 patients had the cyst injected with EO, and in group 2, 21 were treated with AE. One injection was used in cysts of <200 mL and two injections were used in larger cysts. Complete and partial success were defined as complete cyst ablation or a >50% reduction in cyst volume with symptomatic relief, respectively. Patients were followed up using semi-annual ultrasonography and computed tomography for 2 years.
  
  
  RESULTS
  Sclerotherapy was technically successful in all patients. There was no significant difference in cyst volume between the groups. After ≈2 years of follow-up there was complete symptomatic relief in both groups, and the overall radiological success rate was 100% of both groups, at 79% complete and 21% partial in group 1, and 83% complete and 17% partial in group 2. The frequency of transient complications in the form of microscopic haematuria was 7% and 13%, and of low-grade fever in 4% and 10% in groups 1 and 2, respectively.
  
  
  CONCLUSIONS
  EO can replace AE as a sclerosing agent for symptomatic simple renal cysts, as it has comparable efficacy with higher safety and tolerance.
authors.affiliation: Department of Urology, Suez Canal University, Ismailia, Egypt.
authors.forename: Osman Abd
authors.initials: OA
authors.lastname: El-Kader
authors.affiliation: Department of Urology, Fayoum University, Fayoum, Egypt.
authors.forename: Khaled
authors.initials: K
authors.lastname: Mohyelden
authors.affiliation: Department of Urology, Suez Canal University, Ismailia, Egypt.
authors.forename: Adel H
authors.initials: AH
authors.lastname: Metwally
authors.affiliation: Department of Urology, Suez Canal University, Ismailia, Egypt.
authors.forename: Mahmoud H
authors.initials: MH
authors.lastname: Sherif
authors.affiliation: Department of Urology, Suez Canal University, Ismailia, Egypt.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Elnasher
authors.affiliation: Department of Urology, Fayoum University, Fayoum, Egypt.
authors.forename: Hussein
authors.initials: H
authors.lastname: Abdelhameed
authors.affiliation: Zagazig University Hospital, Zagazig, Egypt.
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Azim
keywords: AE, absolute ethanol; Absolute ethanol; Aspiration sclerotherapy; EO, ethanolamine oleate; Ethanolamine oleate; Simple renal cyst; US, ultrasonography