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CNS dysplasia in dysencephalia splanchnocystica (Gruber's syndrome). A case report
Insights
This study details a rare case of Gruber's syndrome in a male infant with multiple congenital malformations and significant central nervous system (CNS) abnormalities. Neuropathological findings suggest a heterochronic pathogenesis and a potential genetic basis for the syndrome.
Area of Science:
- Medical Genetics
- Developmental Biology
- Neuropathology
Background:
- Gruber's syndrome (opisthotonos-poly synostosis syndrome) is a rare autosomal recessive disorder characterized by multiple congenital anomalies.
- Detailed neuropathological descriptions, particularly of central nervous system (CNS) malformations, are scarce in the literature for this syndrome.
Observation:
- A macrosomic male infant presented with macrocephaly, cleft lip and palate, auricular anomalies, hexadactyly, kidney and pancreatic cysts, and a patent foramen ovale.
- The infant experienced generalized convulsions and succumbed to bronchopneumonia at 4 days of age. Chromosomal analysis was normal.
Findings:
- Significant CNS malformations were identified, including a cleft foramen magnum, micropolygria, neocerebral heterotopia, cerebellar hypoplasia, diffuse Purkinje cell heterotopia, and unique heterotopic gray matter in the cervical cord.
- These neuropathological findings are compatible with a heterochronic pathogenesis, indicating developmental timing disruptions.
- The observed malformations, along with familial occurrence, suggest a genetic etiology for Gruber's syndrome.
Implications:
- This case provides a detailed neuropathological description of CNS malformations in Gruber's syndrome, potentially expanding diagnostic criteria.
- The findings highlight the importance of considering genetic factors in syndromes presenting with complex congenital anomalies.
- Further research into the specific genetic mechanisms and developmental pathways underlying Gruber's syndrome is warranted.
Abstract:
A macrosomic male infant with multiple malformations survived for 4 days. His external dysplasias comprised macrocephalus, cheilopalatoschisis, auricular anomalies, and unilateral hexadactyl; his internal dysplasias included cysts of kidneys and pancreas, and a patent foramen ovale. The child had frequent generalized convulsions and died of bronchopneumonia. Chromosomal analysis was normal. The main neuropathological findings were a cleft foramen magnum, micropolygria and heterotopia of the neocerebrum, hypoplasia of the vermis and central white matter of the cerebellum, diffuse heterotopia of Purkinje cells, and unique heterotopic gray matter in the central cervical cord. The infant's disorder was classified as Gruber's syndrome, and this report may be the first detailed description of CNS malformations in this syndrome which, however, are probably not specific for this syndrome. The neuropathological findings were compatible with a heterochronic pathogenesis. this and the familial occurrence of malformations suggest a genetic nature of the syndrome.