Which histologic findings are characteristic CNS cryptococcosis in HIV infection?

Updated: Jan 08, 2020
  • Author: Felicia J Gliksman, DO, MPH; Chief Editor: Niranjan N Singh, MBBS, MD, DM, FAHS, FAANEM  more...
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Answer

Answer

The meninges are opaque, and a capsular material may fill the subarachnoid space. Mixed meningeal infiltrates consisting of lymphocytes, eosinophils, plasma cells, multinucleated giant cells (containing phagocytized organisms), and neutrophils may surround clusters of organisms and sometimes form granulomas, but often the inflammatory response is scant.

Cryptococci extend along Virchow-Robin spaces into the brain. Parenchymal tubercles consisting of pseudocysts filled with organisms without significant inflammatory response, capsule formation, or gliosis are observed most often in the basal ganglia and cortical gray matter, but they may also be found elsewhere.


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