ABSTRACT
Stickler syndrome is a genetically heterogeneous disorder that affects the ocular, auditory, and musculoskeletal systems. Ocular-only variant of Stickler syndrome type 1 (OSTL1) is characterized by high risk of retinal detachment without systemic involvement and is caused by alternatively spliced exon 2 mutation of COL2A1. We report the cases of two Korean families with OSTL1 carrying likely pathogenic variants of COL2A1. All patients presented with membranous vitreous anomaly, peripheral retinal degeneration, and/or rhegmatogenous retinal detachment, but no systemic manifestations. By genetic analysis, two likely pathogenic non-exon 2 variants, c.2678dupC (p.Ala895Serfs*49) and c.3327+ 1G>C, were identified in COL2A1. Our results demonstrate that COL2A1 defects in OSTL1 are not confined to mutations in exon 2. Together with molecular data, ophthalmologists should consider genetic diagnosis of Stickler syndrome in patients with vitreous anomaly to prevent blindness from retinal detachment. To our knowledge, this is the first report of genetically confirmed OSTL1 in Korea.
Subject(s)
Adult , Female , Humans , Male , Middle Aged , Arthritis/genetics , Asian People/genetics , Base Sequence , Collagen Type II/genetics , Connective Tissue Diseases/genetics , DNA Mutational Analysis , Exons , Hearing Loss, Sensorineural/genetics , Republic of Korea , Retinal Detachment/genetics , Visual AcuityABSTRACT
Se reportan cinco pacientes con incontinencia de pigmento pertenecientes a una familia, quienes han padecido la misma enfermedad desde el nacimiento. Todas del sexo femenino, dos de ellas con complicaciones oculares severas. Se hace una descripción de la enfermedad, sus complicaciones y formas de establecer el diagnóstico; se señala la importancia del consejo genético