Purpose: To report a pediatric patient with bilateral chorioretinopathy and microcephaly who from birth to 2 years of age is reaching appropriate developmental milestones.
Design: Retrospective case report with clinical findings and literature review.
Main Outcome Measures: Clinical findings and visual acuity estimated by sweep visual evoked potentials (VEP), electroretinogram (ERG) and fundoscopic exam.
Results: A microcephalic child with normal motor and cognitive development had improving sweep VEP despite atypical fundoscopic findings of bilateral chorioretinopathy, attenuated retinal vessels, and anomalous optic nerves. The etiology for these collective findings despite extensive workup, including prenatal TORCH titers and neuro-imaging, has remained unidentified.
Conclusions: Most published cases of microcephaly with chorioretinopathy have described patients with mild to severe mental retardation. Patients with chorioretinopathy and microcephaly may, however, reach all developmental milestones with improvement in visual development as was seen in this case. The long-term cognitive and visual prognosis may be better than previously reported.
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http://dx.doi.org/10.1080/13816810701538554 | DOI Listing |
Ophthalmic Genet
January 2025
Departments of Medical Genetics and Ophthalmology & Visual Sciences, University of Alberta, Edmonton, Alberta, Canada.
Background: Pathogenic variants in , a kinesin family gene, cause MCLMR and FEVR. In MCLMR, chorioretinal atrophy is present in the majority of cases and can be a helpful diagnostic sign.
Cases: We present the cases of two patients with chorioretinal atrophy and microcephaly who carry novel mutations.
Mol Syndromol
December 2024
Institute of Medical Genetics and Genomics Ganga Ram Institute of Post Graduate Medical Education and Research Sir Ganga Ram Hospital, New Delhi, India.
Am J Med Genet A
February 2025
Division of Clinical Genomics, Department of Pathology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
Pathogenic variants in KIF11 are linked to microcephaly with or without chorioretinopathy, lymphedema, or impaired intellectual development (MCLMR). To our knowledge, renal phenotypes have not been described in the literature in association with KIF11-related disorders. This study is a case report of two probands with heterozygous pathogenic variants in KIF11 who presented with the common clinical features of MCLMR but also had additional renal involvement not previously reported as associated phenotypes of MCLMR, elucidating phenotypic expansion of this syndrome.
View Article and Find Full Text PDFBackground: Microcephaly with or without chorioretinopathy, lymphedema, or mental retardation is a rare autosomal dominant disease caused by mutations in KIF11 which disrupt EG5 protein function, impacting the development and maintenance of retinal and lymphatic structures due to its expression in the retinal photoreceptor cilia. The primary ocular finding in MCLMR is chorioretinopathy. Additional features can include microphthalmia, angle-closure glaucoma, persistent hyperplastic primary vitreous, cataract, pseudo-coloboma, persistent hyaloid artery, and myopic or hypermetropic astigmatism.
View Article and Find Full Text PDFBiochem Res Int
June 2024
Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Chieti, 66100, Italy.
Eg5 is a protein encoded by KIF11 gene and is primarily involved in correct mitotic cell division. It is also involved in nonmitotic processes such as polypeptide synthesis, protein transport, and angiogenesis. The scientific literature sheds light on the ubiquitous functions of KIF11 and its involvement in the onset and progression of different pathologies.
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