Even Sjogren's is a mess for diagnosis....it can be anything from seroneg. sicca to full blown one tick short of scleroderma. Rheumatology needs to fix this mess. They likely go with Sjogren's whenever there is PN, but PN can occur in ALL immune diseases.....There is also UCTD, and if the ENA is negative, UCTD is a possibility, and UCTD will likely be diagnosed even more in the future.

For some reason when there is PN, they jump to Sjogren's, even if it is seroneg.

I dunno....well, at least you know something autoimmune is going on....same for me.