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Bilateral optic nerve hypoplasia
Insights
Bilateral optic nerve hypoplasia in children is often linked to significant brain and endocrine issues. Early diagnosis and management are crucial for addressing associated neurological and hormonal problems.
Area of Science:
- Pediatric Ophthalmology
- Pediatric Neurology
- Pediatric Endocrinology
Background:
- Bilateral optic nerve hypoplasia (ONH) is a congenital condition affecting vision.
- It can be associated with various neurological and endocrine abnormalities.
- Understanding these associations is vital for comprehensive patient care.
Purpose of the Study:
- To investigate the clinical characteristics and associated abnormalities in children with bilateral ONH.
- To highlight the spectrum of neurological and endocrine dysfunctions in these patients.
- To emphasize the importance of thorough evaluation in cases of bilateral ONH.
Main Methods:
- Retrospective review of 15 children diagnosed with bilateral ONH.
- Clinical assessment including ophthalmological, neurological, and endocrine evaluations.
- Neuroradiological investigations (CT scans) were performed.
Main Results:
- The study included 15 children (5 boys, 10 girls) presenting with bilateral ONH at a mean age of 5 months.
- Common presentations included suspected blindness, abnormal eye movements, seizures, and developmental delay.
- Significant findings included neural damage (microcephaly, seizures), intellectual disability, and hypothalamic-pituitary dysfunction in a majority of cases.
- Associated conditions included absent septum pellucidum and other central nervous system malformations.
Conclusions:
- Bilateral optic nerve hypoplasia is frequently associated with serious brain and endocrine abnormalities.
- Comprehensive multidisciplinary assessment is essential for affected children.
- Early identification of associated conditions can guide timely intervention and management.
Abstract:
In the past 10 years, 15 children with bilateral optic nerve hypoplasia have been studied at the Royal Alexandra Hospital for Children. There were 5 boys and 10 girls. Nine were first-born and they presented at a mean age of 5 months (range: 4 days to 25 months). Five presented with suspected blindness and 7 with abnormal eye movements (nystagmus or less commonly squint). The other 3 presented because of fits or developmental delay. Eight showed evidence of neural damage--microcephaly, seizures and/or abnormalities of tone. Four appeared to be of normal or near normal intelligence, 6 were mildly retarded and 5 severely so. Two patients had already died, one suddenly. Six of the 7 cases investigated in detail had evidence of hypothalamic pituitary dysfunction. Another one had a minimal hypothalamic abnormality. Four were severely growth retarded and 2 were receiving growth hormone replacement. Two males had micropenis and a girl had precocious puberty with partial diabetes insipidus. Neuroradiological investigations showed an absent septum pellucidum in only 5 cases. Five patients had other major CNS malformations. Five patients had normal CT scans; 3 of these 5 appeared of normal intelligence and all 5 had normal neurological examinations. Bilateral optic nerve hypoplasia is frequently associated with serious brain and endocrine abnormalities.