Tractography delineates microstructural changes in the trigeminal nerve after focal radiosurgery for trigeminal neuralgia.

Despite widespread clinical use of GKRS for the treatment of TN, there are no objective imaging methods to adequately correlate treatment and outcome, particularly since TN GKRS is associated with delay in pain relief [8] and a relatively lower risk of facial dysesthesia compared with other TN treatments [9] , although more recent reports demonstrate an increasing trend of facial dysesthesiae with time [10] – [12] .

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