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Temporal Artery Congo Red, 40x,

Temporal Artery Congo Red, 40x,
(C) 2009, All Rights Reserved. authorizes the reproduction and use of this image for any educational, noncommercial purpose, so long as the image is not altered and appropriate credit is cited to and to the creator of the image.

Two polarizing filters block out most of the light from the microscope light source. However, the light that passes through amyloid becomes visible, and appears this characteristic shade of "apple green." An area of apple-green birefringence is indicated by the unnecessarily large green arrow.

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