Related Experiment Video

Updated: Jul 18, 2026

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
09:53

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery

Published on: July 5, 2021

Primary intraorbital ectopic meningioma

T Yokoyama, S Nishizawa, K Sugiyama

    Skull Base Surgery
    |December 16, 2006
    PubMed

    Insights

    This study details a rare case of intraorbital meningioma, specifically a meningothelial meningioma found outside the optic dura. The successful surgical removal using a modified Dolenc approach highlights a novel treatment for this ectopic orbital tumor.

    Area of Science:

    • Neurosurgery
    • Ophthalmology
    • Pathology

    Background:

    • Meningiomas are tumors arising from the meninges.
    • Intraorbital meningiomas are rare, with most originating from the optic nerve sheath.
    • Ectopic meningiomas can occur in various locations, including the orbit.

    Observation:

    • A case of a primary intraorbital meningioma located entirely outside the optic dura is presented.
    • Operative findings confirmed the tumor's extra-dural origin within the orbit.
    • Histopathological examination identified the tumor as a meningothelial meningioma.

    Findings:

    • The tumor was a primary intraorbital ectopic meningioma, distinct from typical intraorbital meningiomas.
    • Complete tumor removal was achieved using a modified Dolenc surgical approach.
    • The surgical approach provided access to the orbital apex region for tumor resection.

    Implications:

    • This case expands the understanding of meningioma origins and presentations within the orbit.
    • The modified Dolenc approach is effective for managing tumors in the orbital apex.
    • Highlights the importance of considering ectopic origins for orbital tumors and tailored surgical strategies.

    More Related Videos

    Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas07:43

    Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas

    Published on: January 17, 2018

    Related Concept Videos

    Muscles of the Eye01:20

    Muscles of the Eye

    The muscles of the eye are sophisticated structures that control eye movement and focus, allowing for the precise and rapid adjustments necessary for vision. The human eye is controlled by ten muscles — six extraocular muscles, three intraocular muscles, and one primary eyelid retractor muscle.
    Extraocular Muscles
    The six extraocular muscles surround the eyeball and control its movements. They are responsible for a wide range of eye motions, including looking up, down, left, right, and rotating...
    Glaucoma: Overview01:25

    Glaucoma: Overview

    Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
    Brain Abscess l: Introduction01:26

    Brain Abscess l: Introduction

    A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...