Pulsed Radiofrequency Neuromodulation for the Treatment of Saphenous Neuralgia

sensation in the right medial knee, calf, and ankle.He walked with a limp due to pain but and not weakness.The patient had experienced severely disabling conditions for over 1 month.The pain and tingling sensation occurred every 5-10 minutes and lasted more than 5 minutes per episode.A neurological examination was normal, except for severe pain and tingling sensation in the right medial knee, calf, and ankle.Lumbar magnetic resonance imaging (MRI) revealed no acute lesions except for distal degenerative changes at multiple levels.Knee MRI revealed no acute lesion except for mild degenerative osteoarthritis.A nerve conduction study revealed an absence of a right saphenous response in both the medial leg and the infrapatellar region, while normal findings were recorded from the left side.Electromyography was normal for all muscles tested.Before visiting our outpatient clinic, the patient had undergone a variety of treatments, including medication, an intra-articular injection for knee pain, and acupuncture around the right knee and medial calf.However, his symptoms did not improve but instead progressed.Saphenous nerve blocks using a local anesthetic and steroids were performed twice at 1-week intervals with fluoroscopy in our clinic.The target sites of nerve blocks were two point, the saphenous nerve around adductor's canal and the sartorial branch of the saphenous nerve around