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Background Trigeminal neuralgia(TN), hemifacial spasm (HFS) and glossopharyngeal neuralgia (GPN) were referred to hyperactive dysfunction syndromes (HDSs) of the cranial nerves. These symptoms may occur synchronously or metachronously, but the combination of three diseases is extremely rare. Methods From 2007 through 2013, six patients with coexistent GPN-HFS-TN were treated in our department. The combined symptoms occurred on the same side in three and on both sides in three. These patients underwent nine microvascular decompression (MVD) procedures in total. The clinical data including operative findings were respectively analyzed, and the etiological factors as well as treatment strategies were discussed. Results Intraoperatively, in all the cases a small posterior fossa was found, which was crowded with cranial nerve roots and cerbellar vesels. Postoperatively, spasm was stopped immediately in four and within 3 months in two; the symptom of TN disappeared immediately in four and within 2 weeks in two; the symptom of GPN was relieved immediately in four and improved with medication in two. During the up to 77 months’ follow-up, no changes, recurrence or any dysfunctions of cranial nerves were observed in any of the patients. Conclusions The combination of HFS-TN-GPN is extremely rare and is often associated with a looped VBA and a smaller posterior fossa. However, MVD is still a good choice for treatment. To achieve a safe and effective outcome, dissection of the caudal cranial nerves and proximal transposition of the vertebral artery before decompression of the affected nerve roots are strongly recommended.

Background Hyperactive dysfunction syndrome (HDS) refers to a constellation of symptoms developing from cranial nerve overactivity caused by neurovascular compression at the root entry or exit zone near the brainstem. Although the combined features of HDS are seen in the elderly, there are no reports of such cases in adolescents, to date. Case presentation A 17-year-old male was diagnosed with right glossopharyngeal neuralgia and treated with microvascular decompression. He experienced new-onset right facial pain later and was diagnosed with right trigeminal neuralgia, which required prompt radiofrequency thermocoagulation of the right mandibular nerve. Follow-up in the third post-treatment year revealed the absence of symptom recurrence. Discussion We report the treatment of a rare case of adolescent-onset combined HDS presenting as trigeminal and glossopharyngeal neuralgia. This report highlights the possibility of combined hyperactive dysfunction syndrome in younger age groups. It is crucial to establish a diagnosis early on for prompt management.