Contusions are one of the most frequent types of TBI (Fig.24Z.z6). Contusions most commonly occur in the subfrontal cortex, the frontal and temporal lobes, and occasionally in the occipital lobes. The are often associated with a subarachnoid hemorrhage. Contusions may occur at the site of the blunt trauma or the opposite site of the brain, known as a "contrecoup" injury.
Intracerebral hemorrhage can occur days after significant blunt trauma, often at the site of resolving contusions. This complication is more common with patients with a coagulopathy. CT scans in the immediate postinjury phase are often normal.
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