| Clinical Features and Molecular Characteristics of Korean Patients with Congenital Aniridia. |
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In Kyun Hahn, Dae Hee Kim, Hyun Taek Lim |
1Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. htlim@amc.seoul.kr
2Department of Ophthalmology, Myongji Hospital, Seonam University College of Medicine, Goyang, Korea. |
| 한국인 선천성 무홍채증의 임상양상과 분자유전학적 특성 |
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한인균1⋅김대희2⋅임현택1 |
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울산대학교 의과대학 서울아산병원 안과학교실1, 서남대학교 의과대학 명지병원 안과학교실2 |
Correspondence:
Hyun Taek Lim,
Email: htlim@amc.seoul.kr
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Received: 16 June 2016 • Revised: 6 July 2016 • Accepted: 18 August 2016 |
| Abstract |
PURPOSE
To introduce clinical features and molecular characteristics of Korean patients with congenital aniridia. METHODS: Patients with iris hypoplasia were diagnosed clinically as congenital aniridia and were included in the study. Best corrected visual acuity (BCVA) and associated ocular abnormalities (including severity of iris hypoplasia, nystagmus, keratopathy, and foveal hypoplasia), and findings in optical coherence tomography were analyzed. PAX6 analysis,multiplex ligation-dependent probe amplification (MLPA), genomic molecular karyotyping, and candidate gene sequencing were performed to detect genetic abnormalities. RESULTS: 28 patients from 18 families were included in the study. BCVA varied from hand motion to 20/25. No manifest nystagmus was found in 3 patients, but the rest of the patients had pendular horizontal nystagmus. Keratopathy was found in 23 patients, cataracts in 12 patients, and glaucoma in 4 patients. All patients had foveal hypoplasia, including one case with a subtle phenotype. The PAX6 mutation was detected in 13 families out of 18;2 (p.Trp162Leufs*38,p.Gly409Arg) were novel,3 families had the miss ensemutation, and 3 families had alargedeletion in the PAX6 gene. CONCLUSIONS: This study adds 2 novel PAX6 mutations related to congenital aniridia to those previously reported. Congenital aniridia is a serious, sight-threatening ocular malformation, but central vision and the degree of iris hypoplasia were highly variable. The PAX6 mutation was detected in 72% of the patients in this study, and there were no specific clinical features differentiating aniridia with and without PAX6 mutations. |
| Key Words:
Aniridia;Foveal hypoplasia;Iris hypoplasia;Mutation;PAX6 |
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