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Retrogasserian neurotomy

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retrogasserian neurotomy --> trigeminal rhizotomy

(Science: procedure) division or section of a sensory root of the fifth cranial nerve, accomplished through a subtemporal (frazier-Spiller operation), suboccipital (dandy operation), or transtentorial approach.

Synonym: retrogasserian neurectomy, retrogasserian neurotomy.