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How is a brain abscess diagnosed?

The diagnosis is established by a computed tomography (CT) (with contrast) examination. At the initial phase of the inflammation (which is referred to as cerebritis), the immature lesion does not have a capsule and it may be difficult to distinguish it from other space-occupying lessions or infarcts of the brain. Within 4-5 days the inflammation and the

concomitant dead brain tissue are surrounded with a capsule, which gives the lesion the famous ring-enhancing appearance on CT examination with contrast (since intravenously applied contrast material can not pass through the capsule, it is collected around the lesion and looks as a ring surrounding the relatively dark lesion). Lumbar puncture procedure, which is performed in many infectious disorders of the central nervous system is contraindicated in this condition (as it is in all space-occupying lesions of the brain) because removing a certain portion of the cerebrospinal fluid may alter the concrete intracranial pressure balances and cause a part of the brain tissue to move out of the skull (brain herniation).

Ring enhancement may also be observed in cerebral hemorrhages (bleeding) and some brain tumors. However, in the presence of the rapidly progressive course with fever, focal neurologic findings (hemiparesis, aphasia etc) and signs of increased intracranial pressure, the most likely diagnosis should be the brain abscess.

More information on brain abscess

What is a brain abscess? - A brain abscess is an infection in the brain that is encapsulated and localized to one or more areas inside of the brain. A brain abscess is a mass of immune cells, pus, and other material.
What causes a brain abscess? - Brain abscess is an abscess caused by inflammation and collection of infected material coming from local or remote infectious sources within the brain tissue.
What're the symptoms of a brain abscess? - The symptoms of brain abscess are headache, drowsiness, confusion, seizures, hemiparesis or speech difficulties together with fever with a rapidly progressive course.
How is a brain abscess diagnosed? - The diagnosis of brain abscesses is established by a computed tomography (CT) (with contrast) examination.
What's the treatment for a brain abscess? - The treatment for brain abscess includes lowering the increased intracranial pressure and starting intravenous antibiotics.
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