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A 29-year-old homeless man was admitted to the hospital after being stabbed in the chest. A hemothorax was diagnosed, and a chest tube was placed. One day after admission, he had a generalized tonic–clonic seizure. He was afebrile and had no meningeal signs but had left hemiparesis and hyperreflexia. On questioning, he reported having had increased weakness on the left side during the preceding year. Magnetic resonance imaging of the head with the administration of gadolinium showed a ring-enhancing mass in the right parietal lobe (Panels A and B, arrows). This was interpreted as a central nervous system neoplasm, and . . . [Full Text of this Article] |