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Trigeminal neuralgia (TN) is a severe unilateral facial pain involving 1 or more branches of the trigeminal nerve (CNV). Microvascular decompression is a standard curative treatment of pharmacoresistant classic TN. Alternative procedures used for secondary or idiopathic TN usually lead to a high rate of pain recurrence and sensitive deficits. Partial sensory rhizotomy (PSR) is one of these ablative procedures. However, the lack of anatomic knowledge about the somatotopy of CNV lead to variable results in pain relief and hypoesthesia.

To refine the somatotopy of CNV and bring new anatomic landmarks for PSR, studying a cohort of patients treated by a targeted PSR (TPSR).

Retrospective and consecutive cases of adult patients treated in our institution between March 2000 and June 2015 for pharmacoresistant TN without vascular compression were collected. Our surgical procedure …