American College of Rheumatology Diagnostic Criteria for Gout Presence of characteristic urate crystals in the joint fluid or Presence of a tophus proven to contain urate crystals by chemical means or polarized light microscopy or Presence of six or more of the following clinical, laboratory, or radiologic findings: - Asymmetric swelling within a joint on radiography - Attack of monoarticular arthritis - Culture of joint fluid negative for microorganisms during attack of joint inflammation - Development of maximal inflammation within one day - Hyperuricemia - Joint redness - More than one attack of acute arthritis - Pain or redness in the first metatarsophalangeal joint - Subcortical cyst without erosions on radiography - Suspected tophus - Unilateral attack involving first metatarsophalangeal joint - Unilateral attack involving tarsal joint #gout #criteria #diagnosis #Rheumatology #ACR
