Stereotactic mesencephalic tractotomy for thalamic pain

Area of Science:

• Neurosurgery
• Pain Management
• Neurology

Background:

• Central pain syndrome (CPS) is a debilitating condition often resulting from cerebrovascular accidents.
• Thalamic pain, a type of CPS, significantly impacts patient quality of life.
• Stereotactic mesencephalic tractotomy has been utilized for decades to address intractable pain.

Purpose of the Study:

• To evaluate the long-term efficacy and safety of stereotactic mesencephalic tractotomy for treating thalamic pain.
• To compare outcomes between different surgical targets within the mesencephalon.
• To assess the reduction in postoperative complications.

Main Methods:

• Retrospective review of 24 patients with central pain following cerebrovascular accidents who underwent stereotactic mesencephalic tractotomy.
• Analysis of long-term pain relief, surgical target (superior vs. inferior colliculus), and postoperative complications.
• Assessment of ocular movement disorders and binocular vision problems.

Main Results:

• Sixteen out of 24 patients (66.7%) reported long-term pain relief.
• The superior colliculus target yielded a 75% relief rate, while the inferior colliculus target showed 58.3% relief.
• Postoperative ocular movement disorders decreased from 83.3% to 20%, and binocular vision issues were eliminated (50% to 0%).
• The overall mortality rate was 7.4%.

Conclusions:

• Stereotactic mesencephalic tractotomy remains a viable and effective treatment for thalamic pain.
• Refinement of the surgical target may influence efficacy, but overall benefits are substantial.
• The procedure demonstrates significant improvements in safety and reduced side effects, particularly concerning visual disturbances.