ANATOMY OF THE EAR  
Keratin Patches
(Osmium Stain)

Keratin Patches
(Osmium Stain)

Description : The shape and distribution of keratin patches can be clearly demonstrated by staining the surface of a cadaveric tympanic membrane with 1 % osmium tetroxide.

The osmium stain is taken up by the keratin patches, staining them black.

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