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Epidermoid cyst (microscopic view)

The wall of an epidermoid cyst consists of keratinizing stratified squamous epithelium with maturing lamellar keratin on the upper half of the figure. There is a layer with keratohyaline granules (arrow) in the superficial portion of viable layers. The lower half of the figure consists of gliotic brain tissue. Hematoxylin and eosin stain. Scale bar = 50 micrometers. (Contributed by Dr. H Brent Clark.)

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