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Mentor alpha-1 inflatable penile prosthesis cylinder aneurysm: an unusual complication.

This report describes the author's experience with Mentor Alpha-1 inflatable penile prosthesis cylinder aneurysms. In a series of 93 consecutive cases three implants developed a cylinder aneurysm. Two aneurysms developed intraoperatively and one developed 27 months postoperatively. Literature review suggests that the Mentor Alpha-1 penile prosthesis cylinders are very resistant to aneurysm formation under normal circumstances. However aneurysmal dilatation may occur if the cylinders are subjected to unusual stress.