title: Gyrate atrophy of the choroid and retina with hyper-ornithinemia responsive to vitamin B6: a case report.
abstract: BACKGROUND
  Gyrate atrophy of the retina and choroid is a rare autosomal recessive inherited disease, characterized by progressive chorioretinal atrophy that results in progressive deterioration of peripheral and night vision and leading to blindness.
  
  
  METHODS
  This report presents a case of a 28-year-old man consulting for a progressive fall of visual acuity with hemeralopia. Eye fundoscopy showed regions of confluent rounded chorioretinal atrophy. The visual field and retinal angiography were altered. A high level of plasma ornithine (629 nmol/mL) was detected and a diagnosis of gyrate atrophy of the retina and choroid was made. The patient was treated with high dose Pyridoxine supplement (300 mg/d for 6 months) and the ornithine level of his serum was successfully reduced.
  
  
  CONCLUSIONS
  The exact mechanism of chorioretinal atrophy in hyper-ornithinemia is not known and a small percentage of the affected people respond to Vitamin B6 supplementation.
authors.affiliation: Retina Service, Department of Ophthalmology, Nikookari Hospital - Drug of Applied research center, Tabriz University of Medical Sciences, Tabriz, Iran. javadzadehalireza@yahoo.com.
authors.forename: Alireza
authors.initials: A
authors.lastname: Javadzadeh
authors.forename: Davood
authors.initials: D
authors.lastname: Gharabaghi