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Pathogenic variants in the Cadherin 3 (CDH3) gene are responsible for the occurrence of Hypotrichosis with Juvenile Macular Dystrophy (HJMD) and Ectodermal Dysplasia, Ectrodactyly and Macular Dystrophy Syndrome (EEMS), both of which are rare autosomal recessive disorders characterized by hypotrichosis and progressive macular dystrophy. The CDH3 gene encodes for P-cadherin, a calcium-binding protein that is essential for cell–cell adhesion, which is expressed in the retinal pigment epithelial cells and hair follicles Fundus examination of both eyes was done in addition to clinical investigation. Genomic DNA was extracted from a whole-blood sample and whole-exome sequencing (WES) was performed to identify the underlying etiology. All identified variants were evaluated for their pathogenicity and causality. We present the first case of HJMD in a 23-year-old female patient from Jordan. The patient presented to our ophthalmology clinic with poor vision in both eyes. Gross examination revealed sparse scalp hair along with macular dystrophy on fundus exam in both eyes. HJMD was suspected and whole-exome sequencing (WES) confirmed the diagnosis with the identification of a homozygous frameshift deletion (p.Gly277AlafsTer20) localised in exon 7 of the CDH3 gene. Blindness due to progressive macular degeneration is a common manifestation in numerous syndromic recessive disorders such as HJMD. Ophthalmologists should consider the importance of systemic manifestations and genetic testing for the confirmation of diagnosis.

The first reported case of CDH3 -related hypotrichosis with juvenile macular dystrophy from Jordan: a case report