I was tested for Serum Protein Electrophoresis in June 2011. The result was normal.

May I ask, can this "normal result" be still true on or after the onset of my PN symptoms? My symptoms started October 2011. I am not sure if I make sense...what I am trying to ask is do I need another Serum Protein Electrophoresis test now or my test last june 2011 still okay? My neuro believes that one test, regardless of when it was taken, is enough.

Thank you.