| Brain Tumor
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| | location in the brain. Undifferentiated
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| A brain tumor - primary or secondary -
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| | neuroectodermal tumors of the cerebellum
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| can cause a variety of signs and symptoms
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| | have historically been referred to as
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| because it can directly press on or
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| | medulloblastomas, while tumors of
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| invade brain tissue. This can damage or
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| | identical histology in the pineal region
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| destroy areas responsible for sight,
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| | would be diagnosed as pineoblastomas. The
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| movement, balance, speech, hearing,
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| | nomenclature of pediatric brain tumors is
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| memory or behavior. Brain tumor symptoms
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| | controversial and potentially confusing.
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| vary from patient to patient, and most of
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| | Some pathologists advocate abandoning the
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| these symptoms can also be found in
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| | traditional morphologically-based
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| people who do NOT have brain tumors.
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| | classifications such as medulloblastoma
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| Therefore, the only sure way to tell if
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| | in favor of a terminology that relies
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| you have a brain tumor or not is to see
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| | more extensively on the phenotypic
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| your doctor and get a brain scan. The
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| | characteristics of the tumor.
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| growth of abnormal cells in the tissues
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| | Primary Brain Tumor
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| of the brain. Brain tumors can be benign
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| | Astrocytomas - these tumors arise from
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| (non-cancerous) or malignantA primary
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| | small, star-shaped cells called
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| brain tumor is a group (mass) of abnormal
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| | astrocytes. They may grow anywhere in the
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| cells that start in the brain. This
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| | brain or spinal cord. In adults,
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| article focuses on primary brain tumors
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| | astrocytomas most often arise in the
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| in adults. Brain tumors encompass
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| | cerebrum. In children, they occur in the
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| neoplasms that originate in the brain
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| | brain stem, the cerebrum and the
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| itself (primary brain tumors) or involve
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| | cerebellum. A grade III astrocytoma is
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| the brain as a metastatic site. Brain
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| | sometimes called anaplastic astrocytoma.
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| tumors (metastatic brain tumors), which
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| | A grade IV astrocytoma is usually called
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| are malignant, are more common. These
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| | glioblastoma multiforme.
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| tumors result from cancer that started
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| | Brain stem gliomas - These tumors occur
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| elsewhere in the body and spread
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| | in the lowest, stem-like part of the
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| (metastasized) to the brain.
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| | brain. The brain stem controls many vital
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| Classification
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| | functions. Most brain stem gliomas are
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| HISTOPATHOLOGIC CLASSIFICATION - Primary
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| | high-grade astrocytomas.
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| brain tumors are classified by light
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| | Secondary Brain Tumor
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| microscopy according to their predominant
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| | Metastatic brain tumors originate from
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| cell type and graded based upon the
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| | malignant tumors located primarily in
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| presence or absence of standard
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| | other organs. Their incidence is higher
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| pathologic features. Historical attempts
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| | than that of primary brain tumors. The
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| at developing a classification system for
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| | most frequent types of metastatic brain
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| brain tumors date back to the 1830s. The
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| | tumors originate in the lung skin
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| German pathologist Rudolf Virchow first
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| | (malignant melanoma, kidney
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| introduced the term "glioma" in 1860.
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| | (hypernephroma, breast (breast
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| Virchow was also the first to attempt a
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| | carcinoma), and colon (colon carcinoma).
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| correlation of microscopic to macroscopic
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| | These tumor cells reach the brain via the
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| features of CNS tumors.
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| | blood-stream.
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| Cellular Classification-He classification
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| | Some non-tumoral masses and lesions can
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| of brain tumors is based on both
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| | mimic tumors of the central nervous
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| histopathological characteristics and
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| | system.
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