I went to the Neurologist 5 years ago with the burning feet. I was diagnosed with idiopathic neuropathy. I also was found to have monoclonal gammopathy of unknown significance. MGUS. Yes, there is a direct correlation between MGUS and PN. I have to have my blood tested once a year, to make sure that my protein level doesn't rise. It can turn into multiple myloma. Not a good cancer. So far....my level is at .01, and it has stayed that way for five years. I can live with the burning pain.....