Spontaneous and prolonged drug-induced erection in a patient with inflatable penile implant.

Achievement of spontaneous tumescence after penile implant surgery has already been reported. However, regular spontaneous full, rigid erection upon sexual arousal that is adequate for vaginal penetration and tumescence for satisfactory sexual performance is an extremely rare condition in men with three-piece hydraulic implants. Similarly, prolonged erection is not expected in such implant cases even with the use of erectogenic agents. We report this interesting phenomenon confirmed by magnetic resonance imaging technique in a patient with inflatable device.