Sample Question: A 62-year-old man is admitted with 6 months of recurrent fevers (102-103°F), fatigue, and a rash on his chest and arms. The fevers occur every 3-4 weeks and last 1-2 weeks. He has tried colchicine without benefit. Prednisone 30 mg daily controls symptoms but they return when tapered below 15 mg. He's otherwise healthy with no prior medical problems. When he tried anakinra for presumed adult-onset Still's disease, he developed severe injection site reactions requiring discontinuation. Labs: WBC 11,500, Hgb 9.8 g/dL with MCV 108 fL, platelets 88,000, ESR 95 mm/hr, ferritin 850 ng/mL. Bone marrow biopsy shows hypercellular marrow with vacuoles in myeloid and erythroid precursor cells. What genetic test should be ordered?