celiac disease, like myasthenia has a "known" presentation, and it is rarely considered in patients that have atypical symptoms.
but, in fact a signficant number of patients with untreated celiac will have unsual "out of the box" symptoms including obscure neurological symptoms, and even findings on MRI.

also, not all patients will have findings on commonly used tests.

I highly recomend the book by Jerome Groopman-"how doctors think", which describes in the first chapter, a patient with celiac which was diagnosed as anorexia and other psychiatric problems for more then 10 years (does that sound familiar?).

http://www.npr.org/templates/story/s...toryId=8946558

alice