Role of Gamma Knife radiosurgery in trigeminal neuralgia – Its long term outcome and prediction using Artificial neural Network model

•Gamma knife radiosurgery is an important tool in the management of medically refractory trigeminal neuralgia.•Around 10–15 percent of patients may develop numbness post Gamma knife radiosurgery, but this correlates with better outcome in terms of pain relief.•Involvement of V1 dermatome, post GKT numbness are favourable prognostic factors.•History of failed MVD for trigeminal neuralgia is associated with poor outcome.