What is the work up for gout?

Blood test (SUA [could be normal during attack hx of high level], inflammatory markers, kidney function test) Renal uric acid measure in high risk pt (renal calculi, strong fam hx, first attack before 25) Xray Erosions (overhanging edges, bony erosions, punched out border [cookie cutter], asymmetrical, predilection of distal joints) US (double contour sign, hyperechoic, irregular line of crystal on surface of cartilage, wet clump of sugar tophi hyper and hypoechoic, bony erosions adjacent to tophi deposits)