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| Brain Neoplasms Brain Cancer | Brain Tumors | Cancer of Brain | Malignant Primary Brain Tumors | Neoplasms, Intracranial | Benign Neoplasms, Brain | Brain Neoplasm, Primary | Brain Neoplasms, Benign | Brain Neoplasms, Malignant | Brain Tumor, Primary | Brain Tumor Neoplasms of the intracranial components of the central nervous system, including the cerebral hemispheres, basal ganglia, hypothalamus, thalamus, brain stem, and cerebellum. Brain neoplasms are subdivided into primary (originating from brain tissue) and secondary (i.e., metastatic) forms. Primary neoplasms are subdivided into benign and malignant forms. In general, brain tumors may also be classified by age of onset, histologic type, or presenting location in the brain. |