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Efficacy of Ultrasound-Guided Pulsed Radiofrequency for Recalcitrant Metatarsalgia
A Case Report
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Metatarsalgia is characterized by pain in the forefoot, which is associated with increased stress over the metatarsal head region. Despite the availability of a variety of conservative or surgical treatments for this condition, a few cases have demonstrated relapse or poor response to treatment. Pulsed radiofrequency (PRF) can provide pain relief in patients with diverse chronic conditions without causing neural injury. Recently, studies have shown that ultrasound-guided PRF may be beneficial for adhesive capsulitis, carpal tunnel syndrome, tarsal tunnel syndrome, and recalcitrant plantar fasciitis. Here, we describe a successful case of significant pain relief achieved by using ultrasound-guided PRF targeting the posterior tibial nerve (PTN) at the ankle of a 67-year-old woman with recalcitrant metatarsalgia. Ten minutes after ultrasound-guided PRF was applied at the PTN, the patient reported decreased pain (from 8 to 3 on a visual analogue scale) and did not exhibit any particular side effects. Three months after PRF application, the patient's visual analogue scale score remained more than 50% below the baseline, and she did not need additional conservative treatment during the follow-up period. To the best of our knowledge, we present the first case report using ultrasound-guided PRF at the PTN for treatment of recalcitrant metatarsalgia. We hypothesize that ultrasound-guided PRF at the PTN may be a potentially novel approach for treating recalcitrant metatarsalgia.
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