Orbital meningiomas may arise from primary optic nere sheath meningiomas (ONSM), ectopic orbital meningiomas, or extension of intracranial meningiomas.

• 眶部脑膜瘤可能起源于视神经鞘脑膜、异位的眶部脑膜，或者颅内脑膜瘤的延伸。原发性视神经脑膜瘤少见。