Eyelid Tumors With Reference to Lesions Confused With Squamous Cell Carcinoma

Abstract

In the past decade new concepts in dermal pathology have developed regarding many lesions that had formerly been interpreted clinically and histologically as squamous cell carcinoma. In view of these developments, a study was undertaken to determine the relative incidence of eyelid tumors in the Registry of Ophthalmic Pathology, with particular emphasis on the ratio of basal cell to squamous cell carcinomas. In the light of our present knowledge, we also reclassified a group of lesions which had originally been diagnosed histologically as squamous cell carcinoma. This article reports the statistical results of these studies. Future articles in this series will discuss the clinicopathologic aspects of some of the lesions which have been confused with squamous cell carcinoma. Materials and Methods In order to determine the incidence of various eyelid tumors in the Registry of Ophthalmic Pathology, 1,176 eyelid lesions received and coded in the five-year period from 1955 to