How is cerebritis diagnosed in Haemophilus influenzae type b (Hib) meningitis?

Updated: Jul 09, 2018
  • Author: Prateek Lohia, MD, MHA; Chief Editor: Niranjan N Singh, MBBS, MD, DM, FAHS, FAANEM  more...
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Answer

The low-density changes of cerebritis may be quite difficult to identify by CT scanning, although after contrast administration, the margins of areas of cerebritis are sometimes surrounded by a rather indistinct and nonhomogeneous halo. Occasionally, contrast is also found in the center of such regions. Evolution of brain abscess in such regions results in a ring of low density surrounded by contrast enhancement that is itself contained within a larger low-density area of brain edema. These changes are much more distinct on MRI.

Unlike some other types of meningitis, abscess formation is uncommon in Hib meningitis. Abscess formation may be detected in scans obtained because the patient has developed focal deficits or seizure.


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