Conus Medullaris Stimulation With 5 Columns Lead Versus Medical Treatment in Refractory Pudendal Neuralgia

PRE-SCREENING CRITERIA: * Male or female aged 18 years or over * Pudendal neuralgia according published Nantes criteria * History of failure medical management : defined by HAS such as intractable pain after failure (by side effect, ineffective, or contraindication) at effective dose and combination of following treatment: * Pain treatment OMS analgesics Level I or II * Tricyclicantidepressant * Antiepileptics * Nerve block * Muscle relaxants * Physiotherapy * TENS (Transcutaneus electric nerve stimulation) * Psychobehavioral approach * Failure of pudendal nerve decompression surgery performed more than 12 months ago * Neuropathic pain according to criteria of the Neuropathic Pain Diagnostic Questionnaire (DN4). * Subjects able of giving informed consent * Affiliation with French social security system. * Average or maximum pain experienced greater than or equal to 5/10 on a visual analogue scale INCLUSION CRITERIA: * Average or maximum pain experienced greater than or equal to 50/100 on a visual analogue scale (average of data collected 7 days prior to the inclusion visit and recorded by the patient on the clinical diary) * Evaluation by multidisciplinary team including neuro-surgeons, algologists and psychologists performed, (if not already done in the previous year for algologists and psychologists) * Given informed consent. EXCLUSION CRITERIA: * Pregnant, or planning to become pregnant during the study (12months) * Adults under guardianship or truste…