J Korean Ophthalmol Soc.  2021 Jul;62(7):1003-1007. 10.3341/jkos.2021.62.7.1003.

Two Cases of Ocular Manifestations in Patients with Microdeletion of the Chromosome 7 Long Arm

• Kim SY
• Lee SM
• Shin J
• Lee JE
• Kim SJ

• KMID: 2518506
• DOI: http://doi.org/10.3341/jkos.2021.62.7.1003

Abstract

Purpose
We report ocular manifestations in two patients with 7q microdeletion.
Case summary
(Case 1) A 62-day-old male infant was admitted to the ophthalmology outpatient department for ocular examination after being diagnosed with microdeletion of chromosome seven (7q36.2q36.3 deletion) in DNA microarray comparative genomic hybridization (DNA microarray CGH) and fluorescence in situ hybridization (FISH) tests. Fundus examination showed optic disc hypoplasia in both eyes and retinopathy of prematurity, accompanied by retinal hemorrhage in his right eye. Around the age of 24 months, the patient was diagnosed with intermittent exotropia with anisometropia and was prescribed spectacles. (Case 2) A 3-year-old male infant was referred to the ophthalmology clinic to evaluate poor fixation, which was found during rehabilitation therapy for cerebral palsy and developmental delay. Fundus examination showed an increased cup/disc ratio bilaterally. A flash visual evoked potential test indicated a decrease in amplitude in his right eye. Intermittent exotropia of forty prism diopters was observed. DNA microarray CGH and FISH tests performed at another hospital revealed microdeletion of chromosome seven (7q35 microdeletion) and CNTNAP2 gene loss.
Conclusions
When genetic anomalies associated with ocular development are identified, it is necessary to detect the ophthalmic abnormalities early and provide the appropriate treatment to allow for the development of normal visual function.

Keyword

Chromosome deletion, Eye manifestations, Optic nerve