Novel biallelic AHR splice site mutation cause isolated foveal hypoplasia in Saudi patient: a case report. (4th May 2022)

• Record Type: Journal Article
• Authors: AlMoallem, Basamat; Alharthi, Essam
• Is Part Of: Ophthalmic genetics. Volume 43:Number 3(2022)
• Page Start: 425
• Page End: 429
• Publication Date: 2022-05-04
• Subjects: OCTA -- avascular zone -- foveal hypoplasia -- AHR gene -- splice site mutation -- novel; Eye -- Diseases -- Genetic aspects -- Periodicals; Eye Diseases -- genetics -- Periodicals; Eye Diseases -- in infancy & childhood -- Periodicals; 617.7
• DOI: 10.1080/13816810.2022.2039718
• Languages: English
• ISSNs: 1381-6810

Abstract

ABSTRACT: Case description: A 12-year-old boy with a history of decreased vision and photophobia since he was 1 year old. Comprehensive clinical and molecular approaches were applied to evaluate his condition by which a detailed ophthalmological examination revealed bilateral isolated foveal hypoplasia with the absence of the avascular zone. Novel homozygous aryl hydrocarbon receptor ( AHR ) splice site mutation NM_001621.4: c.899_908 + 15del (p.?) was identified and segregated within the family members. Conclusion: This case represents the first report of autosomal recessive isolated foveal hypoplasia without infantile nystagmus in the literature and the second reported AHR mutation with autosomal recessive isolated foveal hypoplasia post the original cloning paper. Our identified novel splice site AHR mutation supports the pathogenicity of the AHR gene and expands its phenotypic spectrum.