We report a patient with right trochlear nerve palsy after percutaneus radi
ofrequency trigeminal rhizolysis involving the ophthalmic division of the r
ight trigeminal nerve. Of the postoperative complications of percutaneous r
adiofrequency trigeminal rhizolysis, extraocular nerve injuries are uncommo
n and the sixth nerve is the frequently affected one. This is a case report
of isolated trochlear nerve palsy as a complication of percutaneous radiof
requency trigeminal rhizolysis.