Abstract
Abstract We studied the scientific literature and disease guidelines in order to summarize the clinical utility of genetic testing for gyrate atrophy of the choroid and retina (GACR). GACR is inherited in an autosomal recessive manner, and has a prevalence of 1/50000 in Finland. In the international literature there are approximately 200 biochemically confirmed cases. GACR is caused by mutations in the OAT gene. Clinical diagnosis involves ophthalmological examination, electrophysiological testing (electroretinography - ERG), coherence tomography and assay of ornithine levels in body fluids. The genetic test is useful for confirming diagnosis, as well as for differential diagnosis, couple risk assessment and access to clinical trials.
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