PURPOSE: To describe the clinical features of members of a family with acorea, microphthalmia and cataract syndrome. In addition, to perform linkage analysis on family members to determine possible candidate genes. METHODS: Comprehensive ophthalmic examinations were performed on five affected members of a family consisting of a paternal grandmother, father and three children. In addition, DNA was extracted from nine family members (the five affected and four normal members) and used for genome-wide single nucleotide polymorphism genotyping and linkage analysis. RESULTS: All of the affected patients had acorea or fibrous occlusion of the pupil, microphthalmia and cataracts in both eyes. They also had microcornea and iridocorneal dysgenesis. Examination of the crystalline lens was hindered by the abnormal iris surface, but cataracts were detected by ultrasound biomicroscopy. Surgical reconstruction of the pupil allowed a better view of the posterior pole of the eye, and ophthalmoscopy showed a normal retina and optic disc. No systemic abnormalities were observed. Linkage analysis did not reach significance but narrowed the location of possible candidate genes to chromosomes 1, 5, 8, 11 and 17. CONCLUSIONS: This acorea, microphthalmia and cataract syndrome has not previously been reported. Genetic analyses indicate that this syndrome is probably due to an autosomal dominant mutation.
PURPOSE: To describe the clinical features of members of a family with acorea, microphthalmia and cataract syndrome. In addition, to perform linkage analysis on family members to determine possible candidate genes. METHODS: Comprehensive ophthalmic examinations were performed on five affected members of a family consisting of a paternal grandmother, father and three children. In addition, DNA was extracted from nine family members (the five affected and four normal members) and used for genome-wide single nucleotide polymorphism genotyping and linkage analysis. RESULTS: All of the affected patients had acorea or fibrous occlusion of the pupil, microphthalmia and cataracts in both eyes. They also had microcornea and iridocorneal dysgenesis. Examination of the crystalline lens was hindered by the abnormal iris surface, but cataracts were detected by ultrasound biomicroscopy. Surgical reconstruction of the pupil allowed a better view of the posterior pole of the eye, and ophthalmoscopy showed a normal retina and optic disc. No systemic abnormalities were observed. Linkage analysis did not reach significance but narrowed the location of possible candidate genes to chromosomes 1, 5, 8, 11 and 17. CONCLUSIONS: This acorea, microphthalmia and cataract syndrome has not previously been reported. Genetic analyses indicate that this syndrome is probably due to an autosomal dominant mutation.
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Keywords:
Embryology and development; Eye (Globe); Genetics; Lens and zonules; Pupil