The notion of a tumour in the brain is a most terrifying prospect for most individuals and many physicians. Yet brain tumour is the second most common form of malignancy in childhood, and accounts for the 3rd or 4th most frequent cause of cancer death among middle-aged adults. More optimal control of primary malignancies has also contributed to a phenomenal increase in the incidence of metastatic brain tumours. The advent of AIDS has also contributed to the rise in lymphoma of the central nervous system (CNS).
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