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*Gastrointestinal includes colon, gastric and pancreatic tumors. Genitourinary includes renal, prostate, testis, cervix and ovarian tumors. Adapted from Posner JB, Chernik NL. Intracranial metastases from systemic cancer. Advances In Neurology 1978; 19:579-92.

*Gastrointestinal includes colon, gastric and pancreatic tumors. Genitourinary includes renal, prostate, testis, cervix and ovarian tumors. Adapted from Posner JB, Chernik NL. Intracranial metastases from systemic cancer. Advances In Neurology 1978; 19:579-92.

TUMORS: CEREBRAL METASTASES AND LYMPHOMA

developing a metastasis reflects its tissue volume and rate of blood flow. Consequently, almost 90% of metatases are supratentorial and the frontal and parietal lobes are most commonly affected.

Approximately 50% of patients with secondary cerebral tumor have more than one lesion. This incidence of multiple metastasis is likely to increase as neuroimaging becomes more sensitive. Multiple lesions are common with melanoma and lung cancer, whereas patients with breast, abdominal and pelvic cancer more often have a single brain metastasis [3].

Cerebral metastases occur with equal frequency in men and women. The incidence of brain metastasis is the same for all races. Brain metastases are most likely to appear in people between 50 and 70 years of age. In children, CNS metastases are most commonly from leukemia, followed by lymphoma, sarcoma and germ cell tumor.

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