1598
We report a 78-year-old man who had acute unilateral total visual loss after retrogasserian phenol injection for the treatment of trigeminal neuralgia.
 ( adverse event: after ,  a 78-year-old man: Subject, 78-year-old: Subject.Age, man: Subject.Gender, acute unilateral total visual loss: Effect, retrogasserian phenol injection: Treatment, trigeminal neuralgia: Treatment.Disorder, injection: Treatment.Route, phenol: Treatment.Drug) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: adverse event,potential therapeutic event, Arguments type: Treatment.Disorder,Treatment.Time_elapsed,Treatment.Dosage,Subject.Race,Treatment.Drug,Treatment.Route,Subject.Disorder,Treatment.Freq,Treatment,Effect,Subject.Population,Treatment.Duration,Combination.Drug,Subject,Subject.Age,Subject.Gender. 
Text: {0} 
Answer:
 ( adverse event: after ,  a 78-year-old man: Subject, 78-year-old: Subject.Age, man: Subject.Gender, acute unilateral total visual loss: Effect, retrogasserian phenol injection: Treatment, trigeminal neuralgia: Treatment.Disorder, injection: Treatment.Route, phenol: Treatment.Drug) 