What to expect at the 1st visit to the Pediatric Rheumatologist?

My son who is 4 has to see a Ped. Rheumatologist on Friday at Cincinnati Children's Hospital for possible Lupus. His ANA and Fed rate tests came back borderline high. What can I expect them to do upon his 1st visit. How rough is this gonna be if he does have Lupus which is what his pediatrician thinks he has?? Thanks