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Brain death is the permanent, irreversible, and complete loss of brain function, which may include cessation of involuntary activity necessary to sustain life. [1] [2 ...
Micrograph showing a colorectal carcinoma metastasis to the cerebellum. HPS stain.. A brain metastasis is a cancer that has metastasized (spread) to the brain from another location in the body and is therefore considered a secondary brain tumor.