Thalamic stereotaxis for chronic pain: ablative lesion or stimulation?

Area of Science:

• Neurosurgery
• Pain Management
• Neurology

Background:

• Persistent pain, whether benign or malignant, poses significant challenges.
• Stereotactic neurosurgery offers potential therapeutic options for intractable pain.

Purpose of the Study:

• To evaluate the efficacy of stereotactic procedures targeting the thalamus for persistent pain management.
• To compare the outcomes of ablative versus stimulation procedures in the thalamus.

Main Methods:

• Twenty-five patients underwent 33 stereotactic procedures on thalamic targets, including the centrum medianum (CM), pulvinar, and ventroposterior nuclei.
• Procedures included 19 ablative and 14 chronic stimulation interventions.

Main Results:

• Ablative stereotactic surgery achieved a success rate of 52.6%.
• Chronic stimulation procedures demonstrated a higher success rate of 66%.
• Thalamic stimulation was most effective for peripheral deafferentation pain; CM ablation was more suitable for central or cancer pain.

Conclusions:

• Stereotactic thalamic procedures are a viable option for managing persistent pain.
• Chronic stimulation appears more effective than ablative surgery for thalamic pain targets.
• Target selection (ventroposterior nuclei vs. CM) should be tailored to the pain type (deafferentation vs. central/cancer pain).