Which of the following are the feature of an uric acid crystal (AIPG 2012)
|A||Slender crystal needle shaped negatively birefringent under polarized light|
|B||Plemorphic and predominantly rhomboid shaped and weakly positively birefringent on ploarized light|
|C||Diamond shaped & strongly positive on polarizing microscopy|
|D||Variable in shape and with no reaction on polarizing microscopy|
Slender crystal needle shaped negatively birefringent under polarized light
Urate crystals are found in the synovial fluid of 85% of acute gout patients. Under polarised light urate crystals appear yellow when parallel to the axis of red compensator and blue when perpendicular to the axis.