The effect of short-term corticosteroid treatment on the CT appearance of experimental brain abscesses.

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Abstract
The effect of short-term corticosteroid treatment on contrast enhancement was investigated in an experimental brain abscess model [.alpha.-streptococcus abscess in dogs]. The degree of enhancement was reduced in the cerebritis stage, unaffected in the capsule stage, and intermediate in the transitional stage. The area and pattern of enhancement were also altered in the cerebritis stage. Although the magnitude of the entire cerebritis time-density curve (extended for 60 min) was decreased by the steroids, its configuration was unchanged. Prior to steroid administration, the 10- and 60-min components of the curve discriminated between cerebritis and capsule stages, with the latter exhibiting a far lower 60-min value. Implications for treatment of brain diseases are discussed.

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