An 84-year-old patient presented with partial extrusion of a semirigid penile prosthesis, implanted 20 years earlier following a diagnosis of erectile dysfunction refractory to oral and injection therapy. Four years previously, the patient was diagnosed with bilateral obliterans arteriopathy limited to the iliac arteries and, two years later, with chronic renal failure. At presentation, the patient complained of lower urinary tract symptoms, and his body temperature was 39 degres C. Physical Examination, Urine Culture, and Blood Tests were performed; a spontaneous partial extrusion of the left rod of the penile prosthesis through a urethral erosion was observed. A manual removal of the eroded cylinder under local anaesthesia was achieved.