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contusion (kәn-too┬┤zhәn)   injury to tissues with skin discoloration and without breakage of skin; blood from the broken vessels accumulates in surrounding tissues to produce pain, swelling, and tenderness. The discoloration is the result of blood seepage just under the skin. Called also bruise.

cerebral contusion  contusion of the brain following a head injury. It may occur with extradural or subdural collections of blood, in which case the patient may be left with neurologic defects or epilepsy. See also cranial hematoma.

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