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Cystic optic nerve sheath meningioma
Tatiana I Rosca1, Benone D Carstocea, Teodora Gh Vlãdescu
1Clinical Emergency Sf. Pantelimon Hospital, Bucharest, Romania. rosca_tatiana@yahoo.com
Summary
A cystic optic nerve sheath meningioma, a rare occurrence, was identified in a woman with a long history of proptosis. This case highlights a tumor-cyst relationship not previously documented in optic nerve sheath meningiomas.
Area of Science:
- Neuro-oncology
- Ophthalmology
- Neurosurgery
Background:
- Optic nerve sheath meningiomas (ONSMs) are tumors arising from meningothelial cells surrounding the optic nerve.
- Proptosis, or bulging of the eye, can be a symptom of various orbital pathologies, including ONSMs.
- Cystic changes are common in intracranial meningiomas but are considered infrequent in ONSMs.
Observation:
- A 58-year-old female presented with a 35-year history of left proptosis.
- Neuroimaging demonstrated a large cystic lesion in the left orbit.
- Surgical exploration revealed an optic nerve sheath meningioma with an associated cyst.
Findings:
- The cystic lesion was confirmed to be an integral part of the optic nerve sheath meningioma.
- This finding represents a tumor-cyst complex within an ONSM.
- This phenomenon, while known in intracranial meningiomas, is rarely described in ONSMs.
Implications:
- This case expands the understanding of the histopathological variations of optic nerve sheath meningiomas.
- It suggests that cystic changes should be considered in the differential diagnosis of ONSMs presenting with proptosis.
- Further research may elucidate the mechanisms behind cyst formation in ONSMs.
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