1. Primary meningiomas are slow growing, cytologically benign tumors that can invade the optic nerve, dura, or extraocular muscles, but do not metastasize. 2. Although many of the presenting signs, symptoms, and clinical patterns for primary meningioma are nonspecific, there can be a distinctive pattern. 3. Treatment depends on the patient's visual acuity, size, and location of the tumor.
