i wasn't able to get a straight answer out of anybody at the radiology 
department regarding why the second mri was requested, so i've cancelled
 it. i was specific: do you think you might see a tumour? do you think 
you might see a lesion? all i could get was "the doctor is requesting a 
second mri". an appeal to authority is simply not convincing to me.
i
 have verified at least that the information was sent to the referring 
doctor, so i will call them on tuesday for further exploration of the 
issue.
while it is possible that the radiologist was just 
incompetent with his notes - that he has a good reason that he didn't 
specify because he's lazy - my reading of the situation is that he's 
just looking for a way to bill me twice, and that that's actually 
probably a good sign because it probably at least rules out the tumour.
as mentioned previously, i'm leaning more towards lyme disease at this point. but, i'm going to need to see the scans myself....