If herpes viruses are commonly implicated in cfs/me, then these viruses love to hang around nerves and cause problems especially if reactivating etc etc Autopsies of people with ME have shown that there is alot of lessions on the nerves consistant with shingles type infections. Many of us get diagnosed with restless leg syndrome but i think mostly its a type of neuropathy and many of us get a similar type of pain in our backs and necks that sound alot like nerve pain. Sorry about your new diagnoses neilk, maybe this could explain some other symptoms. I wonder if the tumor has something to do with ME, many wouldnt have had head scans, i wonder if it would be a relatively common finding in cfs/me. I hope things get better for you sooner. cheers!!!