You most can certainly ask your neuro to take a look at your MRI with regard to your neck. Certain problems might come to a head. MRI’s are mainly of use when symptoms are considered along with MRI findings, just because you have x on MRI doesn’t mean it is the cause of your problem. If however you have neck problems and TN, AND your neck on MRI shows problems then it might, yes might be of consideration to your neuro.
Another problem (and my neighbour is a radiologist, and concedes he should in future look at the neck), they are not taught that the neck can cause these symptoms, they look for tumours, vascular compression (questionable as a cause), and other malformations.
Hence ask your neuro if the neck can cause TN and in the main he doesn’t consider it, for the above so it seriously limits your treatment options, not withstanding by the time you visit your neuro, he has meds, a needle or an option of surgical referal.
Another problem being, if your MRI shows, an upper neck problem it still doesn’t mean it is the cause. However I would consider neck pain and or a positive MRI for a neck problem worth pursuing prior to any ‘traditional’ treatment bearing in mind, everything that goes with it.
As far as I’m aware the main avenue by the medics to confirm, is if cervical blocks alleviate symptoms, but then they have to squidge it in the right place which isn’t easy.
If you have neck trouble and TN, my best would be to address the neck and then think about the TN if it is were still to be a problem, and that would be regardless of any vascular compression seen on MRI at the REZ. At the end of the day this might be involve only self help with regards to the neck