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Joubert-Boltshauser syndrome with polydactyly in siblings
Journal of Neurology, Neurosurgery, and Psychiatry
|August 1, 1982
Summary
Joubert-Boltshauser syndrome, a rare genetic disorder, presents with polydactyly and potential tongue tumors. Brain imaging reveals cerebellar vermis hypoplasia, sometimes with a fourth ventricle cyst.
Area of Science:
- Neurogenetics
- Developmental Biology
- Pediatric Neurology
Background:
- Joubert-Boltshauser syndrome is a rare ciliopathy characterized by specific brain malformations and distinct clinical features.
- Genetic mutations affecting cilia function are implicated in the pathogenesis of Joubert syndrome spectrum disorders.
Observation:
- This report details two siblings exhibiting clinical manifestations consistent with Joubert-Boltshauser syndrome.
- Key features included polydactyly (extra digits) in both siblings.
- One sibling presented with fleshy tumors of the tongue, a less common but significant finding.
Findings:
- Cerebellar vermis hypoplasia was identified via computed tomography (CT) brain scans in both affected individuals.
- In one sibling, this cerebellar anomaly was accompanied by a cyst in the fourth ventricle.
- These neuroimaging findings correlate with the characteristic brainstem-cerebellar malformations seen in Joubert syndrome.
Implications:
- This case series expands the phenotypic spectrum of Joubert-Boltshauser syndrome, highlighting the variability in presentation.
- Early identification of polydactyly and tongue tumors can aid in suspecting this diagnosis in neonates.
- Further research into the genetic underpinnings and long-term outcomes is crucial for improved patient management.