Abstract
Lacrimal sac localization of an Inverted Papilloma is extremely rare and no risk factors are reported in literature. A chemical trauma was followed by a painless, growing mass in the medial canthal area associated with epiphora. Rhinoendoscopy, Computed Tomography and Magnetic Resonance showed a well-defined mass in left lacrimal fossa extended to the nasolacrimal duct. An endoscopic resection and a dacryocystorhinostomy were performed. The aim of the present study is to show an atypical presentation of a well-known tumor along with a suspicious risk factor and to lead otolaryngologists to consider an inverted papilloma of the lacrimal system among lesions causing lateral nasal swelling.
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