Bilateral Limbal Keratin-Associated Amyloidosis

Conjunctival amyloid is usually of the immunoglobulin light chain (AL) variety. The authors report an exceptional case of bilateral limbal amyloid deposits that were identified by mass spectrometry as keratin-related specifically regarding to basal keratinocyte keratins 5 and 14. Cytokeratin-related amyloid has been described by immunohistochemical analysis of formalin-fixed cutaneous and mucous membrane lesions but not ocular tissues. The conjunctival lesion in the right eye contained intraepithelial dyskeratotic cells that extended to the surface, causing a lacy leukoplakia on clinical examination. The authors excluded the diagnosis of hereditary benign intraepithelial dyskeratosis in this patient. Collection of patient data and all protected patient health information was compliant with the Health Insurance Portability and Accountability Act. Accepted for publication January 12, 2018. The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the article. Address correspondence and reprint requests to Norman C. Charles, M.D., NYU Langone Medical Center, 550 First Avenue, New York, NY 10016. E-mail: norman.charles@nyumc.org © 2018 by The American Society of Ophthalmic Plastic and Reconstructive Surgery, Inc., All rights reserved.