The Diagnosis and Treatment of Gout

Robert G. Smith, DPM, MSc, RPh, CPed

Disclosures

US Pharmacist. 2009;34(5):40-47. 

In This Article

Diagnosis

The diagnosis of gout can be straightforward. The only way to establish the diagnosis with certainty is to demonstrate uric acid crystals in synovial fluid or tophi.[7] Polarizing microscopic examination of synovial fluid reveals negatively birefringent crystals, confirming the diagnosis of gout. It must be recognized that normal uric acid levels are observed in approximately 50% of acute gouty flares.[7]

Dalbeth and McQueen's review summarizes recent advances in plain radiography and advanced imaging for gout, calcium pyrophosphate dihydrate crystal arthropathy, and basic calcium phosphate crystal arthropathy.[24] They suggest that high-resolution ultrasonography may improve noninvasive diagnosis of the crystal-induced arthropathies and allow for monitoring of intra-articular tophi. They also determined that computed tomography provides excellent definition of tophi and bone erosion, and three-dimensional computed tomography assessment of tophus volume is a promising outcome measure in gout.[24] Finally, they state that magnetic resonance imaging is also a reliable method for assessment of tophus size in gout and has an important role in detection of complications of the disease in clinical practice.

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