Competing/conflicts of interest: No stated conflict of interest.
Familial retinal detachment associated with COL2A1 exon 2 and FZD4 mutations
Article first published online: 19 JUN 2012
© 2012 The Authors. Clinical and Experimental Ophthalmology © 2012 Royal Australian and New Zealand College of Ophthalmologists
Clinical & Experimental Ophthalmology
Volume 40, Issue 5, pages 476–483, July 2012
How to Cite
Edwards, T. L., Burt, B. O., Black, G. C., Perveen, R., Kearns, L. S., Staffieri, S. E., Toomes, C., Buttery, R. G. and Mackey, D. A. (2012), Familial retinal detachment associated with COL2A1 exon 2 and FZD4 mutations. Clinical & Experimental Ophthalmology, 40: 476–483. doi: 10.1111/j.1442-9071.2012.02804.x
Funding sources: Centre for Eye Research Australia (CERA) receives Operational Infrastructure Support from the Victorian Government. We are grateful of the support provided by Peggy and Leslie Cranbourne Foundation. DAM is a recipient of the Pfizer Australia Senior Research Fellowship.
- Issue published online: 25 JUL 2012
- Article first published online: 19 JUN 2012
- Accepted manuscript online: 10 MAY 2012 07:59AM EST
- Received 21 April 2011; accepted 6 July 2011.
- familial exudative vitreoretinopathy;
- retinal detachment;
Background: To characterize the clinical and genetic abnormalities within two Australian pedigrees with high incidences of retinal detachment and visual disability.
Design: Prospective review of two extended Australian pedigrees with high rates of retinal detachment.
Participants: Twenty-two family members from two extended Australian pedigrees with high rates of retinal detachment were examined.
Methods: A full ophthalmic history and examination were performed, and DNA was analysed by linkage analysis and mutation screening.
Main Outcome Measures: Characterization of a causative hereditary gene mutation in each family.
Results: All affected family members of one pedigree carried a C192A COL2A1 exon 2 mutation. None of the affected family members had early-onset arthritis, hearing abnormalities, abnormal clefting or facial features characteristic of classical Stickler syndrome. All affected members of the familial exudative vitreoretinopathy pedigree carried a 957delG FZD4 mutation.
Conclusions: Patients with retinal detachment and a positive family history should be investigated for heritable conditions associated with retinal detachment such as Stickler syndrome and familial exudative vitreoretinopathy. The absence of non-ocular features of Stickler syndrome should raise the possibility of mutations in exon 2 of COL2A1. Similarly, late-onset familial exudative vitreoretinopathy may appear more like a rhegmatogenous detachment and not be correctly diagnosed. When a causative gene mutation is identified, cascade genetic screening of the family will facilitate genetic counselling and screening of high-risk relatives, allowing targeted management of the pre-detachment changes in affected patients.