Meningiomas

[Luis Fok]

Meningiomas are benign tumors of the meninges that can compress adjacent brain tissue. Symptoms depend on the tumor’s location. Diagnosis is by MRI with contrast agent. Treatment may include excision, stereotactic radiosurgery, and sometimes radiation therapy.
Meningiomas, particularly those lt; 2 cm in diameter, are among the most common intracranial tumors. Meningiomas are the only brain tumor more common among women. These tumors tend to occur between ages 40 and 60 but can occur during childhood.
These benign tumors can develop wherever there is dura, most commonly over the convexities near the venous sinuses, along the base of the skull, and in the posterior fossa and rarely within ventricles. Multiple meningiomas may develop. Meningiomas compress but do not invade brain parenchyma. They can invade and distort adjacent bone.
There are many histologic types; all follow a similar clinical course, and some become malignant.

[Greta]

a brain tumour that grows from the meninges (= the three layers of tissue that surround the brain and spinal cord) :