Feature |
Gout |
Pseudogout |
Cause |
Deposition of monosodium |
Deposition of calcium |
Most common affected joint |
1st Metatarsophalangeal joint (Podagra) |
Knee joint (most common), wrist |
Synovial fluid findings |
• Needle-shaped crystals • Negatively birefringent crystals |
• Rhomboid-shaped crystals • Positively birefringent crystals |