Secondary trigeminal neuralgia: an in-depth review of etiopathology, clinical manifestations, and management approaches

Secondary trigeminal neuralgia (STN) results from an identifiable underlying pathology, including tumor compression, multiple sclerosis, arteriovenous malformations, hypertension, structural lesions, inflammation, trauma, or familial genetic conditions. This study, through a comprehensive review of the literature in PubMed, Google Scholar, Web of Science, and the Cochrane Library, explores the multifaceted aspects of STN. This study delves into the diverse etiological factors, focusing on the pathophysiological mechanisms that lead to trigeminal nerve dysfunction. The clinical manifestations of STN often overlap with those of primary trigeminal neuralgia, creating diagnostic challenges and necessitating a thorough evaluation that includes detailed history-taking, advanced neuroimaging, and differential diagnosis to pinpoint the secondary cause. The management of STN is complex and tailored to address the underlying etiology. Pharmacological treatments and surgical interventions such as microvascular decompression (MVD), lesion resection, or gamma knife radiosurgery may be needed. Emerging neuromodulation techniques, such as transcranial magnetic stimulation and deep-brain stimulation, have shown promise in refractory cases, particularly for STN associated with multiple sclerosis or structural lesions. This review emphasizes the importance of a multidisciplinary approach to managing STN, integrating neurological, surgical, and rehabilitative strategies to optimize patient outcomes. This finding highlights the need for further research into the role of advanced neuromodulation techniques and novel therapeutic targets to improve the quality of life of patients with STN. By providing a detailed overview of the STN, this study aims to contribute to a better understanding and management of this debilitating condition.