[Stereotaxic surgery in 4 cases of Parkinson's disease]. / Cirugía estereotáxica en cuatro casos de Parkinson.

OBJECTIVE: To determine the therapeutic efficiency of the stereotactic thalamotomy in patients with Parkinson's disease not responsive to medical treatment. METHODS: We performed four stereotactic thalamotomies using Leksell's system for the inactivation of the thalamic ventrolateralis nucleus. RESULTS: Upon re-examination 5 to 58 months after surgery, complete relief of tremor, rigidity and pain was observed; only one case showed a light tremor in the contralateral side three months after surgery. CONCLUSION: Stereotactic thalamotomy is of benefit for the control of medically refractory parkinsonism.