I am going to tell you which tests my doctors odered. Maybe that will give you an idea of how
many things they have to
test for in order to
rule out or rule in a disease.
I originally had these screening tests, ordered by my ENT doctor at the University:
ANA, ESR, CRP, c-ANCA, and RF.
2 months later, when I saw my Rheumatologist, she ordered the following tests, some of which contain several specific tests for specific diseases.