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Ocular Surface Squamous Neoplasia: A Review

Basti, Surendra MD; Macsai, Marian S. MD


Even though ocular surface squamous neoplasia (OSSN) has been recognized for well over a century, the past decade has witnessed advances that have helped rewrite many of the paradigms for the diagnosis and management of these lesions. OSSN occurs predominantly in the elderly for whom they are the third most common oculoorbital tumors after melanoma and lymphoma. In addition to advanced age and male sex, other major risk factors linked to its pathogenesis are ultraviolet light, cigarette smoking, and the human papilloma virus. Although the latter has been linked to OSSN for nearly 4 decades, its identification and role in the pathogenesis of these tumors has been elucidated recently and is addressed in detail in this review. Newer techniques of impression cytology represent a noninvasive and reliable method of diagnosing OSSN and monitoring treated cases. The efficacy of chemotherapeutic agents such as mitomycin C and 5-fluorouracil have been proven in the recent past, making them a clear alternative to the time-tested treatment of surgical excision and cryotherapy. Early reports on the efficacy of topical Iterferon α 2b indicate significant promise in providing another alternative for the treatment of some of these neoplasms. These advances thus represent a minimally invasive and highly successful approach to the diagnosis and treatment of OSSN.

From the Department of Ophthalmology (Drs Basti and Macsai), Feinberg School of Medicine, Northwestern University, Chicago, Illinois and Division of Ophthalmology (Dr Macsai), Evanston Northwestern Healthcare, Evanston, Illinois.

Received for publication December 7, 2002; accepted July 1, 2003.

Reprints: Marian S. Macsai, MD, Division of Ophthalmology, Glenbrook Hospital, 2050 Pfingsten Road, Suite 220, Glenview, Illinois 60025 (

© 2003 Lippincott Williams & Wilkins, Inc.