Question 975
{"accessible":false,"alternatives":[{"id":4887,"text":"bilateral in around 20% of cases"},{"id":4888,"text":"isolated maxillary branch (CN V2) involvement suggests multiple sclerosis"},{"id":4889,"text":"ophthalmic branch (CN V1) is most commonly affected"},{"id":4890,"text":"peak incidence in young to middle age adults"},{"id":4891,"text":"vascular compression is the cause in around 95% of cases"}],"archived":false,"correctAlternativeId":4891,"explanation":"\u003cp\u003eVascular compression of the trigeminal nerve near the root entry zone is the most common cause of trigeminal neuralgia and accounts for around 95% of cases. The superior cerebellar artery is the most commonly implicated vessel.\u0026nbsp;\u003c/p\u003e\u003cp\u003eTrigeminal neuralgia is rarely bilateral (around 3%) and when bilateral multiple sclerosis or benign/malignant lesions should be suspected rather than vascular compression.\u0026nbsp;\u0026nbsp;\u003c/p\u003e\u003cp\u003eThe maxillary branch (CN V2) is the most commonly affected division of the trigeminal nerve, while isolated involvement of the ophthalmic branch (CN V1) can be a feature of multiple sclerosis.\u003c/p\u003e\u003cp\u003ePeak incidence is in older patients,\u0026nbsp;around 60 to 70 years of age.\u0026nbsp;\u003c/p\u003e","id":975,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/977","nextQuestionPath":null,"relatedArticles":[{"id":33200,"title":"Trigeminal neuralgia","link":"/articles/trigeminal-neuralgia?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eWhich is true of trigeminal neuralgia?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/975"}],"attemptsPercentages":[{"alternativeId":"4888","percentage":4},{"alternativeId":"4889","percentage":8},{"alternativeId":"4891","percentage":61},{"alternativeId":"4890","percentage":18},{"alternativeId":"4887","percentage":9}],"promptToLogin":false,"questionManager":false,"articleId":"trigeminal-neuralgia-protocol-mri"}