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Papillomas of lacrimal drainage system: a clinicopathologic study.

This paper presents a clinicopathologic review of Schneiderian papillomas in the lacrimal drainage system, nasal cavity, and paranasal sinuses. The embryologic, histopathologic, and clinical aspects of these lesions are discussed. A more practical classification for the papillomas of the lacrimal drainage system, offering a better understanding of their histogenesis and an easy follow-up system, is proposed.