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Anatomy of the Brain: Ventricles

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There are hollow fluid-filled cavities known as ventricles deep inside the human brain. There are two lateral ventricles, one in each cerebral hemisphere, and each has three different projections — the anterior, inferior, and posterior horns visible from the lateral side. A thin membrane called the septum pellucidum separates the two lateral ventricles. The slender third ventricle in the diencephalon is connected to each lateral ventricle via a channel called the interventricular foramen.

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[Meningiomas].

Michel Kalamarides¹, Stéphane Goutagny

¹Service de neurochirurgie, hôpital Beaujon, 92110 Clichy. michel.kalamarides@bjn.aphp.fr

La Revue Du Praticien

|February 24, 2007

Summary

This summary is machine-generated.

Meningiomas, tumors of the arachnoidal cells, are common in older women. While most are benign and treatable with surgery, some meningiomas exhibit aggressive behavior requiring radiation therapy.

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Area of Science:

Neurosurgery
Oncology
Neuropathology

Background:

Meningiomas constitute approximately 25% of primary central nervous system tumors.
These tumors originate from arachnoidal cells and typically affect older adults, with a higher prevalence in women.
The vast majority (90%) of meningiomas are slow-growing and benign.

Purpose of the Study:

To provide an overview of meningiomas, including their origin, clinical presentation, and management.
To discuss the therapeutic strategies for different types of meningiomas.
To highlight the prognostic factors influencing patient outcomes.

Main Methods:

Review of existing literature on meningiomas.
Analysis of clinical data regarding diagnosis and treatment outcomes.
Classification of meningiomas based on histopathological and clinical behavior.

Main Results:

Meningiomas present with diverse symptoms such as neurological deficits and epileptic seizures.
Surgical resection is the primary treatment modality for most meningiomas.
Fractionated radiotherapy and stereotactic radiosurgery are employed for recurrent, inaccessible, or aggressive meningiomas.

Conclusions:

While most meningiomas have a favorable prognosis post-treatment, aggressive subtypes can lead to significant patient morbidity and mortality.
Timely diagnosis and appropriate treatment selection are crucial for managing meningiomas effectively.
Further research into the biological behavior of aggressive meningiomas may improve therapeutic strategies and patient outcomes.