title: Cylinder aneurysm of parylene-coated American Medical System (AMS) 700CX penile prosthesis.
abstract: BACKGROUND
  Cylinder aneurysms and leakages are uncommon with three-layered American Medical System (AMS) CX cylinders. Since 2001, an additional parylene coating improves cylinder wear.
  
  
  OBJECTIVE
  To report two patients in whom major cylinder aneurysms developed less than 4 years after implantation.
  
  
  METHODS
  Two patients in separate urologic private practices developed significant cylinder aneurysms requiring reoperation.
  
  
  RESULTS
  Both patients developed aneurysms in 21-cm parylene-coated CX cylinders just short of 4 years of inflatable penile prosthesis (IPP) placement. Both did well after the explantation and insertion of Coloplast Titan IPP (Coloplast; Minneapolis, MN, USA).
  
  
  CONCLUSIONS
  Longer AMS CX IPP cylinders may develop aneurysms more than 3 years after insertion.
authors.affiliation: Urology Research Options, Aurora, CO 80012, USA. joelk1123@comcast.net
authors.forename: Joel M
authors.initials: JM
authors.lastname: Kaufman
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Weldon