Clinicopathologic analysis of 166 patients with primary acquired nasolacrimal duct obstruction

To determine the prevalence of lacrimal sac pathology in patients undergoing dacryocystorhinostomy (DCR) for primary acquired nasolacrimal duct obstruction (PANDO).Observational case series.One hundred sixty-six patients with symptoms of PANDO.A total of 202 lacrimal sac biopsies were obtained from 166 patients undergoing external DCR procedures for symptoms of PANDO.Patient demographics, presenting symptoms and signs, relevant history, and...