A 58 year-old African American male was referred to ophthalmic oncology clinic for bilateral optic nerve calcification detected incidentally on a CT scan. The patient had no significant past medical history. The CT scan also showed extensive dural calcification, involving the falx cerebri and tentorium. After a normal eye examination that revealed 20/15 vision in both eyes and normal optic nerve function and appearance, the patient underwent B-scan ultrasonography and MRI. The calcification was localized to the optic nerve sheaths with no abnormal enhancement or optic nerve signal intensity abnormality on MR imaging. These findings were inconsistent with bilateral optic nerve sheath meningiomas, and the patient was diagnosed with idiopathic dural optic nerve sheath calcification.
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