Trigeminal extracranial thermocoagulation along with patient-controlled analgesia with esketamine for refractory postherpetic neuralgia after herpes zoster ophthalmicus: A case report

Figure 1 Percutaneous radiofrequency thermocoagulation was performed under the guidance of computed tomography. A: The puncture needle reached the left supraorbital foramen; B: Three-dimensional reconstruction of the puncture needle and left supraorbital foramen.