Case 125. Acanthamebic meningoencephalitis (60 y-o M)

       
  Brain biopsy from highly edematous right hemisphere in case of alcoholic liver cirrhosis manifesting left hemiparesis (HIV: negative)  
       

 

  Some of the large round cells around small vessels, resembling macrophages, possess round nuclei with central karyosome, a characteristic microscopic feature of protozoa (HE, high power).