Genes in dizygote twins with Bowman layer corneal dystrophy
Journal
Optometry and Vision Science
Journal Volume
92
Journal Issue
4
Pages
S20-S24
Date Issued
2015
Author(s)
Abstract
Purpose. To report a de novo R124C mutation of transforming growth factor β-induced (TGFBI) gene in one of dizygotic twins with corneal dystrophy of the Bowman layer. Case Report. An 11-year-old boy was one of dizygotic twins and had a history of bilateral blurred vision and recurrent corneal erosion. Examination of the visual acuity demonstrated 20/40 in his each eye. Biomicroscopy showed bilaterally central corneal subepithelial opacities and some dot opacities in the superficial stroma. Anterior segment optical coherence tomography demonstrated most hyperreflective opacities at the subepithelial layer with some interspersed opacities in the superficial stroma. Confocal microscopy revealed irregular hyperreflective materials in the Bowman layer and the superficial stroma. Several rough filaments were found in the middle layer of stroma, corresponding to a feature of amyloid lattice. The corneas of his parents and dizygotic sister were clear. Sequencing of the TGFBI gene revealed an R124C mutation in the affected boy but not in his three healthy family members. Conclusions. A de novo R124C mutation of the TGFBI gene may occur in one of dizygotic twins. Patients with an R124C mutation may have clinical features like corneal dystrophy of the Bowman layer. Confocal microscopy can be used to detect subclinical lattice lines, thereby facilitating differential diagnosis. Copyright ? 2015 American Academy of Optometry.
Other Subjects
Confocal microscopy; Diagnosis; Opacity; Optical tomography; Bowman layer; Corneal dystrophy; de novo mutation; Dizygotic twin; Lattice; TGFBI; Genes; betaIG-H3 protein; scleroprotein; transforming growth factor beta; Bowman membrane; case report; child; confocal microscopy; Corneal Dystrophies, Hereditary; dizygotic twins; exon; female; genetics; human; male; mutation; nucleotide sequence; optical coherence tomography; pathology; pedigree; physiology; twins; visual acuity; Bowman Membrane; Child; Corneal Dystrophies, Hereditary; Diseases in Twins; DNA Mutational Analysis; Exons; Extracellular Matrix Proteins; Female; Humans; Male; Microscopy, Confocal; Mutation; Pedigree; Tomography, Optical Coherence; Transforming Growth Factor beta; Twins, Dizygotic; Visual Acuity
Type
journal article