Items tagged “optic nerve”

5 results found
Article

Optic pathway glioma

Optic pathway gliomas are relatively uncommon tumors, with a variable clinical course and usually seen in the setting of neurofibromatosis type I (NF1). Histologically the majority are pilocytic astrocytomas. They are characterized by imaging by an enlarged optic nerve seen either on CT or MRI....
Article

Optic nerve sheath meningioma

Optic nerve meningiomas are benign tumors arising from the arachnoid cap cells of the optic nerve sheath and represent ~20% of all orbital meningiomas, the majority of which are direct extensions from intracranial meningiomas.  These tumors typically appear as masses within the optic nerve, iso...
Article

Optic nerve sheath diameter

Optic nerve sheath diameter has significance in the assessment of papilledema in cases of elevated intracranial pressure. Pathology The optic nerve sheath demonstrates changes in diameter with CSF pressure changes as there is a layer of subarachnoid space between the nerve and its sheath, whic...
Article

Orbital apex syndrome

Orbital apex syndrome, also known as Jacod syndrome, is a constellation of clinical findings, presenting as a result of several potential pathologies that compress or otherwise affect structures passing through the orbital apex. Clinical presentation Presentation is according to the structures...
Article

Saturday night retinopathy

Saturday night retinopathy is an acute ischemic retinopathy, choroidopathy, and orbitopathy secondary to prolonged ocular pressure during a drug-induced stupor. Epidemiology While monocular blindness as a complication of prolonged headrest use in prone neurosurgical procedures has been widely ...

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