Are Considered Ectopic Orbital Meningiomas Really Ectopic?

The authors presented a case of a 74-year-old woman with a medial orbital mass. MRI revealed a subtle tumoral extension from the skull base to the orbit. A biopsy was performed by a retrocaruncular approach. The histologic examination confirmed grade 1 orbital meningioma. The extension from the skull base through the ethmoid sinus to the medial orbit might explain some orbital meningiomas considered as "ectopic." A very slight extension might not be easily identified on MRI.