FIGURE 1 | Modern Pathology

FIGURE 1

From: Evaluation of Crystals in Formalin-Fixed, Paraffin-Embedded Tissue Sections for the Differential Diagnosis of Pseudogout, Gout, and Tumoral Calcinosis

FIGURE 1

Findings under a light microscope and a polarizing microscope (A1, A2, A3, A4, B1, B2, B3, B4, 250 ×; C1, C2, C3, 100 ×). Sections stained with H&E demonstrated relevant histopathology (A1, B1, C1); however, they did not show any birefringent crystals under a polarizing microscope (A2, B2, C2). Sections stained with NAES method demonstrated birefringent crystals under polarized light in pseudogout (A4) and gout (B4) but did not show any birefringent crystals in tumoral calcinosis (C4).

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