a Department of Ophthalmology, University of Washington School of Medicine, Seattle, Washington, USA
b Department of Pathology, University of Washington School of Medicine, Seattle, Washington, USA
Abstract:
Intermediate filaments derived from different cell types are antigenically distinct. Monoclonal antibodies to human intermediate filament proteins can, therefore, be used as tissue-specific reagents capable of distinguishing cell type in poorly differentiated neoplasms. We report a case demonstrating the specificity of antiintermediate filament protein antibodies in establishing a difficult orbital diagnosis of esthesioneuroblastoma.