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[Idiopathic external hydrocephalus]
D Segal-Kuperschmit1, C Cozacov, A Luder
1Pediatric Dept., Rebecca Sieff Hospital, Safed.
Insights
Idiopathic external hydrocephalus in infants typically presents with macrocephaly and developmental delays but has a benign course. Clinical and imaging improvements are observed by age 4.
Area of Science:
- Pediatric Neurology
- Neuroimaging
- Developmental Pediatrics
Background:
- Idiopathic external hydrocephalus (IEH) is a rare condition.
- Characterized by enlarged subarachnoid spaces without significant ventricular dilation.
- Often presents in infancy with macrocephaly and hypotonia.
Purpose of the Study:
- To describe the clinical presentation, neuroimaging findings, and natural history of idiopathic external hydrocephalus in male infants.
- To evaluate the developmental outcomes and long-term prognosis of this condition.
Main Methods:
- Case series of 5 male infants diagnosed with idiopathic external hydrocephalus within their first year of life.
- Clinical assessments including developmental milestones and physical examinations.
- Computed tomography (CT) scans for neuroimaging evaluation.
Main Results:
- All 5 infants presented with macrocephaly, hypotonia, and mild to moderate delays in language and gross motor development; cognition was normal.
- CT scans revealed enlarged subarachnoid spaces with normal or mildly dilated lateral ventricles.
- A benign clinical course was observed, with improvement in developmental delays by age 4 and normalization of CT findings.
Conclusions:
- Idiopathic external hydrocephalus in male infants is a benign condition with a favorable prognosis.
- Developmental delays associated with IEH typically resolve by early childhood.
- Neuroimaging and clinical monitoring are essential for diagnosis and management.
Abstract:
5 male children who had idiopathic external hydrocephalus are described; all were all in the first year of life. Macrocephaly and hypotonia were present in all, as well as mild to moderate delay in language and gross motor development; cognition was normal. CT-scan showed in all enlarged subarachnoid spaces but normal or mildly dilated lateral ventricles. Macrocephaly was present in the fathers of 4 of the 5 families. In all cases the course of this condition was benign. There was clinical and roentgenological improvement between the ages of 2 and 2.5 years; the developmental delay resolved at about age 4, at which time the CT pattern had become normal.