MICROSCPIC FEATURES
EPITHELIUM
Cysts lined by papillary proliferations of bilayered oncocytic epithelium
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- Inner layer:
Tall columnar epithelium
Finely granular and eosinophilic cytoplasm due to presence of mitochondria
Apocrine secretions
Cilia
Outer layer:
- Oncocytic traiangular and occasionally fusiform basaloid cells
Cysts contain eosinophilic cellular debris, laminated bodies resembling corpora amylacea
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Slide 39
