Frequency of conjunctival epithelial dysplasia in patients with pterygium.

Purpose: To determine the frequency of ocular squamous surface neoplasia associated with pterygium in an ophthalmology reference center in Central Mexico.

Methods: We reviewed histopathological reports and slides of all patients who underwent pterygium surgery from 2014 to 2016 at the Instituto Mexicano de Oftalmologia in Queretaro (Mexico).

Results: We studied 177 biopsy samples; 66% were from women, and the median age was 52 years.