I have Sjogrens too and I was getting a chest scan frequently from m.y Cardiologist.  He kept spotting something in my right lung and we thought it was the Sjogrens but this time I got a shock.  It was lung cancer so I had a lobe removed in May.  Add to that I had a stroke in January and I now have an infection on my liver!  I am only saying this is possible, but rare.  I also have itchy ankles.  Primary problem is Psoriatic Arthritis.  Have you tried an OTC cortisone ointment on your itch?  @marylou705