Related Experiment Video
Updated: May 28, 2026
10:14
Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
Published on: May 26, 2023
71-year-old female with right eye proptosis
Brain Pathology (Zurich, Switzerland)
|October 15, 2011
Summary
Primary extradural meningiomas (PEMs) are rare tumors occurring outside the skull without a dural connection. This case highlights a PEM in the orbital bone, emphasizing the need for accurate diagnosis to avoid misinterpretation as primary bone lesions.
Area of Science:
- Neurosurgery
- Oncology
- Radiology
Background:
- Meningiomas typically arise from the meninges covering the brain and spinal cord.
- Primary extradural meningiomas (PEMs) are rare, accounting for 1-2% of all meningiomas.
- PEMs lack dural attachment and can occur within bone, posing diagnostic challenges.
Observation:
- A 71-year-old woman presented with a mass in the right lateral orbital wall.
- The orbital mass showed no evidence of dural involvement.
- Initial radiological assessment raised suspicion of a primary bone lesion.
Findings:
- Pathological examination confirmed the orbital mass as a primary extradural meningioma (PEM).
- This intraosseous PEM mimicked a primary bone tumor on imaging.
- The case underscores the importance of considering rare tumor types in differential diagnoses.
Implications:
- Accurate radiological and pathological diagnosis of PEMs is crucial to differentiate them from primary bone tumors.
- Understanding the diverse presentations of meningiomas aids in appropriate patient management.
- This case contributes to the literature on rare orbital neoplasms and their diagnostic considerations.
More Related Videos
Related Concept Videos
01:24Prosopagnosia
Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
01:27Open Angle Glaucoma: Treatment
In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Drugs such as carbonic anhydrase inhibitors, α2- and...
01:28Angle Closure Glaucoma: Treatment
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
01:25Glaucoma: 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...