Overview
Secondary optic nerve sheath meningiomas arise from the dural sheath surrounding the optic nerve, often presenting with progressive vision loss, optic disc pallor, and characteristic optociliary shunt vessels on imaging. 12Diagnosis
Clinical Presentation: Rapidly worsening, painless monocular vision loss, optic disc pallor, and presence of optociliary shunt vessels. 12
Imaging: MRI showing a well-delineated, hyperintense mass on T2-weighted images with homogeneous enhancement abutting the optic nerve. 1
Fluorescein Angiography: Early filling shunt vessels draining to central venous tributaries with hyperfluorescent late staining differentiates from central retinal vein occlusions, which show later filling and eufluorescent staining. 2
Histopathology: Essential for definitive diagnosis; positive antiprogesterone receptor antibody immunostaining supports the diagnosis. 1Management
Surgical Intervention: Biopsy or resection may be necessary for definitive diagnosis and treatment, especially when clinical course or treatment strategy changes. 1
Radiation Therapy: Often considered for residual or recurrent tumors post-surgery, though specific dosing details are not provided in the abstracts. 1
Observation: In asymptomatic cases or slow-growing tumors, close monitoring without immediate intervention may be appropriate. 1Special Populations
Pregnancy: No specific guidance provided in the abstracts regarding management during pregnancy. 1
Pediatrics: No pediatric-specific details are provided in the abstracts. 1
Elderly: Management considerations for elderly patients are not detailed in the provided abstracts. 1Key Recommendations
Always perform histopathologic examination for definitive diagnosis due to limitations of imaging alone. (Evidence: Strong 1)
Utilize fluorescein angiography to differentiate optic nerve sheath meningioma from conditions like central retinal vein occlusions based on shunt vessel characteristics. (Evidence: Moderate 2)
Consider surgical intervention for both diagnostic clarity and potential treatment, particularly when clinical management hinges on the diagnosis. (Evidence: Expert opinion 1)References
1 Savignac A, Lecler A. Optic Nerve Meningioma Mimicking Cavernous Hemangioma. World neurosurgery 2018. link
2 Boschetti NV, Smith JL, Osher RH, Gass JD, Norton EW. Fluorescein angiography of optociliary shunt vessels. Journal of clinical neuro-ophthalmology 1981. link