Friday Pop Quiz #222
The correct answer is D. Silica.
The image shows a foreign body reaction with sarcoidal granulomas consistent with such a reaction. The presence of colorless, birifrigent crystals is most characteristic of silicosis.
Aluminum and zirconium have no polarizable crystals, while sarcoidosis and gout have different presentations from a foreign body reaction.
References
Pimentel L, Barna …