neurologic disorders
Meningiomas
Introduction
Meningiomas are 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<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. Meningiomas, which are usually benign, 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. 