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Glioblastoma, previously known as glioblastoma multiforme (GBM), is the most aggressive and most common type of cancer that originates in the brain, and has a very poor prognosis for survival. [ 6 ] [ 7 ] [ 8 ] Initial signs and symptoms of glioblastoma are nonspecific. [ 1 ]
On CT imaging, the lesions might show as Well-defined high-density lesion edges and homogeneous enhancement, replicating the meningioma appearance, or as lesions with large necrotic regions and GBM-like heterogeneous contrast enhancement. [21] [22] Marked peritumoral edema is a characteristic and frequent hallmark of gliosarcomas observed on ...
A ring-enhancing lesion is an abnormal radiologic sign on MRI or CT scans obtained using radiocontrast. On the image, there is an area of decreased density (see radiodensity) surrounded by a bright rim from concentration of the enhancing contrast dye. This enhancement may represent breakdown of the blood-brain barrier and the development of an ...
Neuro-oncology is the study of brain and spinal cord neoplasms, many of which are (at least eventually) very dangerous and life-threatening (astrocytoma, glioma, glioblastoma multiforme, ependymoma, pontine glioma, and brain stem tumors are among the many examples of these).
A nervous system tumor is a tumor that arises within the nervous system, either the central nervous system (CNS) or the peripheral nervous system (PNS). [1] [2] Nervous system primary tumors include various types of brain tumor and spinal tumors, such as gliomas, and meningiomas (of the CNS), and schwannomas (of the PNS) and can be either benign or malignant.
Imaging is an important method for diagnosing CNS tumors and determining their location. The location is informative both for identifying the type of tumor and for determining how to treat it. Magnetic resonance imaging (MRI) and computed tomography (CT) scans are the most commonly used imaging technologies for diagnosis of CNS tumors. MRI ...
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