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Anterior cranial base glioneuronal heterotopia
Dattatraya Muzumdar1, Jean Michaud, Enrique C G Ventureyra
1Division of Neurosurgery, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada.
Summary
Cranial base glioneuronal heterotopia is a rare condition mimicking tumors. Early prenatal diagnosis and complete surgical resection are vital for excellent long-term outcomes.
Area of Science:
- Neuroscience
- Developmental Biology
- Pathology
Background:
- Cranial base glioneuronal heterotopia involves ectopic glioneuronal tissue in the basal meninges.
- It originates from aberrant embryonic neuroepithelial cell migration into the subarachnoid space.
- This condition often presents as a space-occupying lesion, mimicking tumors and potentially invading skull structures.
Observation:
- A case of intracranial anterior skull base leptomeningeal glioneuronal heterotopia was diagnosed prenatally via ultrasound in a newborn.
- Magnetic resonance imaging revealed a large, predominantly solid lesion in the anterior cranial fossa extending into the suprasellar and middle fossae.
- The lesion was completely resected surgically via bifrontal craniotomy.
Findings:
- Intracranial extracerebral glioneuronal heterotopia requires careful consideration in prenatal and infant evaluations of intracranial space-occupying lesions.
- Histological differentiation from teratomas and primary central nervous system tumors is crucial.
- Accurate diagnosis is often achievable based on lesion location and anatomical relationships.
Implications:
- Prenatal screening is vital for early detection of glioneuronal heterotopia.
- Complete surgical resection is the curative treatment, leading to an excellent long-term prognosis due to the lesion's benign nature and extraaxial origin.