Posterior fossa partial trigeminal rhizotomy: an alternative to microvascular decompression

Area of Science:

• Neurosurgery
• Neurology

Background:

• Trigeminal neuralgia is a debilitating condition.
• The Frazier-Spiller operation was the prior standard treatment.
• Doctor Walter Dandy pioneered posterior fossa approaches and partial nerve sectioning.

Purpose of the Study:

• To evaluate the efficacy and safety of Dandy's partial trigeminal rhizotomy technique.
• To assess its potential as an alternative to microvascular decompression for trigeminal neuralgia.

Main Methods:

• Twenty patients underwent partial trigeminal rhizotomy using Dandy's technique.
• A sub-occipital craniectomy exposed the trigeminal root entry zone.
• The lower 30% of the trigeminal nerve was sectioned after elevation with a blunt hook and coagulation.

Main Results:

• Complete relief of trigeminal neuralgia was achieved in all twenty patients.
• Minimal sensory loss in the second trigeminal nerve division occurred in all cases.
• Corneal reflex was preserved, and no patient developed anesthesia dolorosa.

Conclusions:

• Partial trigeminal rhizotomy is a technically straightforward and effective treatment for trigeminal neuralgia.
• This procedure offers a valuable alternative to microvascular decompression, with minimal adverse effects.