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2. Birefringence - Wikipedia

   en.wikipedia.org/wiki/Birefringence

   Gout and pseudogout crystals viewed under a microscope with a red compensator, which slows red light in one orientation (labeled "polarized light axis"). [18] Urate crystals ( left image) in gout appear yellow when their long axis is parallel to the slow transmission axis of the red compensator and appear blue when perpendicular.

3. Gout - Wikipedia

   en.wikipedia.org/wiki/Gout

   Uric acid crystals in polarized light, showing negative birefringence, with yellow color when aligned parallel to the axis of the red compensator, and blue when aligned perpendicularly to it. [ 57 ] In contrast, CPPD (pseudogout) displays rhombus-shaped crystals with positive birefringence.

4. Calcium pyrophosphate dihydrate crystal deposition disease

   en.wikipedia.org/wiki/Calcium_pyrophosphate_di...

   When stained with H&E stain, calcium pyrophosphate crystals appears deeply blue ("basophilic"). [10] [11] However, CPP crystals are much better known for their rhomboid shape and weak positive birefringence on polarized light microscopy, and this method remains the most reliable method of identifying the crystals under the microscope. [12]

5. Your Gout Guide: From Symptoms to Treatment - AOL

   www.aol.com/gout-guide-symptoms-treatment...

   Tophi is when uric acid crystals around the joints form larger, hard deposits. It can lead to pain, soft tissue damage, and joint deformities. Folks with gout are more prone to certain other ...

6. File:Birefringence microscopy of pseudogout, annotated.jpg

   en.wikipedia.org/wiki/File:Birefringence...

   English: Microscopy with polarized light of tissue by a metatarsal joint, showing crystals whereof some (one annotated) have rhomboid shape and weak positive nirefringence, consistent with calcium pyrophosphate dihydrate crystal deposition disease (pseudogout).

7. File:Birefringence microscopy of gout, annotated.jpg - Wikipedia

   en.wikipedia.org/wiki/File:Birefringence...

   This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You ...