meningeomen

Meningeomen is not a widely used term; it most often refers to meningioma, a tumor that arises from the meninges, the membranes that cover the brain and spinal cord. Meningiomas are typically slow-growing and usually originate from arachnoid cap cells in the meninges. Most are benign and classified as World Health Organization grade I, though a minority are atypical (grade II) or anaplastic (grade III), which have higher recurrence rates.

Epidemiology and presentation: They occur in adults with a female predominance. Risk factors include exposure to ionizing radiation and certain genetic conditions such as neurofibromatosis type 2. Clinical symptoms depend on location and may include headaches, seizures, or focal neurological deficits. Many tumors are asymptomatic and found incidentally.

Imaging and pathology: On MRI, meningiomas are typically well-defined, extra-axial masses that enhance vividly with gadolinium and may show a dural tail. They can cause thickening or hyperostosis of adjacent skull bone. Histologically, they consist of meningothelial or fibrous tumor cells with characteristic whorled patterns.

Treatment and prognosis: Management depends on size, symptoms, location, and patient factors. Small, asymptomatic tumors may be observed. Symptomatic or enlarging lesions are usually treated with surgical resection; gross total resection offers the best cure rate. Adjuvant radiotherapy or stereotactic radiosurgery is used for residual, recurrent, or higher-grade tumors. Overall prognosis is favorable for grade I meningiomas, with higher recurrence risk for higher grades or subtotal resections.