I know that some seronegative Sjogren's people would disagree with me, but, here goes. Without the serum markers of autoimmune disease, all that one has to link one to the diangosis of Sjogren's is sicca. Sicca is a symptom of many diseases, including neuropathy.

I suspect that many people that suffer from other 'Sjogren's' really have neurological Sicca. (Myself included, or, perhaps the UCTD causes the sicca, but, either way, PN is my main issue)