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Arch Ophthalmol. 2004;122:290-293.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Sinonasal undifferentiated carcinoma (SNUC) is an uncommon malignancy of the nasal and paranasal sinuses. First recognized by Frierson et al¹ in 1986 as a distinct clinical and pathologic entity, it was recently classified as a large cell subtype of poorly differentiated neuroendocrine carcinoma by Mills.² Common initial symptoms include nasal obstruction, epistaxis, and facial pain.³ Late-stage SNUC may exhibit an orbital mass, causing proptosis, diplopia, and visual loss. Orbital invasion occurs in 59% of nasal and paranasal malignant tumors, occasionally demonstrating dental symptoms.⁴ We report a case of SNUC in a patient with recurrent dacryocystitis and epiphora.

Report of a Case.

A 71-year-old Chinese woman was first seen in April 1999. Her chief complaints were sudden onset of swelling and pain over the right medial canthal area for 1 week. Her medical history was remarkable for recurrent dacryocystitis with tearing and discharge. The problem had been waxing and waning for 1 year. There was . . . [Full Text of this Article]

Comment.
Benedict C. C. Liang, FRCS; Yuk-Ping Chau, MB, BS; Dennis S. C. Lam, FRCS, FRCOphth; Nongnart R. Chan, MD
Hong Kong

Corresponding author and reprints: Nongnart R. Chan, MD, Eye Pathology Laboratory, Department of Ophthalmology and Visual Sciences, Chinese University of Hong Kong, Hong Kong Eye Hospital, 147K Argyle St, Kowloon, Hong Kong (e-mail: nongnart28@hotmail.com).

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