Secondary corneal amyloidosis in a patient with Meesmann corneal dystrophy.

BACKGROUND: Meesmann corneal dystrophy (MCD) is a rare autosomal dominant corneal disorder characterized by recurrent epithelial erosions. While secondary corneal amyloidosis (SCA) is well-documented in chronic inflammatory disorders, its occurrence in MCD has not been previously described. CASE: Here we first report a case of concurrent MCA and SCA, the diagnosis was confirmed through clinical evaluation, Anterior segment optical coherence tomography, in vivo laser confocal microscopy, and histopathological examination. Genetic testing identified a novel KRT12 mutation (c.1292G>C, p.R431P) in both the patient and her affected father, though the father exhibited no signs of SCA. CONCLUSIONS: SCA may develop as a rare complication in patients with long-standing MCD, potentially complicating the diagnosis.