Without reviewing the films, I can not provide a diagnosis. The changes in the report sound like non-specific white matter changes which can be seen in patients with migraine, hypertension, diabetes, some
inflammatoryInflammatory bowel disease
Ulcerative colitis conditions such as lupus, anti-cardiolipin antibody syndrome, and possibly in MS. However the absence of lesions in the corpus callosum,
brainstemBrainstem function
Posterior fossa tumor and cerbellum make this less likely. Unfortunately, you will have to wait until the other neurologist has the chance to review the films, spinal fluid, and your exam. I wish I could be of more help. Good luck.