Ultrasound guided pulsed radiofrequency neuromodulation of sphenopalatine ganglion treatment for allergic rhinitis in childern: A case report.

Allergic rhinitis (AR) is a chronic noninfectious inflammation of the nasal mucosa mediated primarily by allergen-specific immunoglobulin E (IgE) in atopic individuals after exposure to allergens, with the involvement of non-IgE-mediated mechanisms and neuroimmune dysregulation. Conservative treatment of AR is ineffective in children who lack compliance, and traditional surgical procedures are risky, making treatment of this community challenging. The sphenopalatine ganglion (SPG), aka pterygopalatine ganglion, is the largest of the four parasympathetic ganglia located within the head region, existing as a bilateral pair. The fibers that arise from the SPG regulate secretomotor functions and provide sensation from various structures, including the lacrimal glands, the mucous membranes of the oropharynx, nasopharynx, nasal cavity, and upper portion of the oral cavity. Previous studies suggest that SPG plays a much crucial role in the neuro-related pathophysiological mechanisms of AR. Pulsed radiofrequency (PRF) is a commonly used technique in pain management to produce neuromodulatory effects without damaging nerve tissue. Previous research suggests that SPG dysfunction is one of the important pathophysiological mechanisms of trigeminal autonomic cephalalgia, and PRF targeting SPG can effectively exert neuromodulatory effects to improve its symptoms. We thus predicted that the application of PRF for neuromodulation of SPG would be beneficial for symptom remission in AR. We report the first case of AR successfully treated with PRF targeting the SPG, symptoms did ameliorate during the 24-week follow-up period, as manifested by the disappearance of nocturnal open-mouth breathing and its murmur and a significant reduction in the frequency and severity of daily episodes of nasal congestion, tearing, and conjunctival congestion, which diversifies clinical interventions for AR.