TOPICS: Staph aureus, streptococcus, neisseria gonorrhea, purulent arthritis, tenosynovitis, dermatitis, erythrocyte sedimentation rate, CRP, arthrocentesis, gouty arthritis, monosodium urate, hyperuricemia, secondary gout, renal failure, lesch nyhan syndrome, needle shaped, negatively birefringent, polarised light, yellow crystals, acute attacks, podagra, chronic gout, tophi, calcium pyrophosphate dihydrate deposition disease, CPPD, calcium pyrophosphate, hemochromatosis, hemosiderosis, rhomboid shaped, positively birefringent