[Surgical treatment: inclusion criteria]

Different surgical strategies have been suggested to treat PD patients. Cerebral grafting remains experimental and pallidotomy is not performed among the French neurosurgery departments. Therefore selection criteria for surgical interventional therapies will be only discussed for deep brain stimulation (DBS) even if these criteria are not really different between grafting, pallidotomy and DBS. Choice of selection criteria is very important in order to separate PD patients with a high probability of clinical benefit after surgery from those in whom the surgical procedure includes a high risk of morbidity. A selection procedure is proposed according to data of the literature and to the results of a questionnaire filled by 7 french expert centers involved in surgical therapies of PD. The selection procedure in a patient with a parkinsonian syndrome lasting for more 5 years has to include: