Ultrasound-Guided Hyaluronic Acid Injection for the Management of Morton's Neuroma

Kang Lee, Il-Yeong Hwang, Chang Hyun Ryu, Jae Woo Lee, Seung Woo Kang
Foot & Ankle International 2018, 39 (2): 201-204

BACKGROUND: Morton's neuroma is one of the common causes of forefoot pain. In the present study, hyaluronic acid injection was performed on patients to determine the efficacy and adverse effects of hyaluronic acid in management of Morton's neuroma.

METHODS: Eighty-three patients with Morton's neuroma in their third intermetatarsal space with definite Mulder's click were included in the study. Those with severe forefoot deformities such as forefoot cavus or hallux valgus on plain X-rays were excluded. Ultrasound-guided hyaluronic acid injections were performed on all patients weekly for 3 weeks. Pain during walking using visual analogue scale (VAS) and AOFAS Forefoot Scale were prospectively evaluated preinjection, and at 2, 4, 6, 12 months postinjection.

RESULTS: Significant improvement in VAS and AOFAS Forefoot Scale were seen overall at 2 months after hyaluronic acid injections ( P < .05). Then, there were almost no changes after 4 months, continuing until 12 months. The mean VAS was decreased from 73.1 initially to 23.0 at 12 months and AOFAS Forefoot Scale was increased from 32.2 to 86.5. There were no complications which occurred.

CONCLUSION: In the present study, ultrasound-guided hyaluronic injection was clinically effective for pain relief and functional improvement for at least 12 months in patients with Morton's neuroma. However, numbness associated with Morton's neuroma should be addressed more cautiously since it may persist without much improvement.

LEVEL OF EVIDENCE: Level IV, retrospective case series.

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