• Giorgio Lambru, Michele Trimboli, Stefano Palmisani, Thomas Smith, and Adnan Al-Kaisy.
• The Headache Centre, Pain Management and Neuromodulation Department, Guy's and St Thomas' NHS Foundation Trust, London, UK. giorgio.lambru@gstt.nhs.uk.
• J Headache Pain. 2016 Dec 1; 17 (1): 66.

BackgroundParesthesia-free cervical 10 kHz spinal cord stimulation (HF10 SCS) may constitute a novel treatment modality for headache disorders, when pharmacological approaches fail. We report the results of a retrospective analysis assessing the long-term safety, tolerability and efficacy of HF10 SCS in a group of patients with chronic refractory primary headache disorders.FindingsFour patients with chronic migraine (CM), two with chronic SUNA (Short-lasting Unilateral Neuralgiform headache attacks with Autonomic symptoms) and one with chronic cluster headache (CCH) refractory to medical treatments, were implanted with cervical HF10 SCS. Pre- and post-implantation data were collected from the medical notes and from headache charts. At an average follow-up of 28 months (range: 12-42 months) we observed an improvement of at least 50 % in headache frequency and/or intensity in all CM patients. One SUNA patient became pain free and the other reported at least 50 % improvement in attacks frequency an duration. The CCH patient reported a significant reduction in CH attacks duration. Two patients underwent a surgical revision due to lead migration.ConclusionsParesthesia-free high cervical HF10 SCS appears to be a long-term safe and likely effective therapeutic approach for patients with chronic refractory primary headache disorders. These results warrant further prospective studies in larger series of patients.

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