• "Cholesteatoma" of the orbit is a variant of pseudotumor histologically characterized by masses of cholesterol crystals. We propose the term "epidermoid or true cholesteatoma" for lesions containing epithelial elements and refer to those nonepithelium-containing pseudotumors as "cholesterol granulomas." Important clinical features distinguish between epidermoid cholesteatomas and cholesterol granulomas of the orbit and justify a separation of these two pathologic entities.
Parke DW, Font RL, Boniuk M, McCrary JA. `Cholesteatoma' of the Orbit. Arch Ophthalmol. 1982;100(4):612–616. doi:10.1001/archopht.1982.01030030614015
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