I have TN, had an MRI, it showed patches that could indicate MS, hence the lumbar puncture.
While I know that some MS patients can present with a normal lumbar puncture test, the fact that I don't have any symptoms of MS (the MRI showed a different cause for the TN pain) and the test was only done because of the MRI white patches, which can have other causes, means that I am happy to think that it means I don't have MS.
Hurrah for me. It's about time I had some good news in relation suffering with this horrible condition.