Case 84. Pneumocystosis (3 y-o M)

       
  Fatal interstitial pneumonia after chemotherapy for disseminated adrenal neuroblastoma  
       

 

  Grocott-stained cysts in a paraffin section were observed at the ultrastructural level. In addition to the cyst wall, so-called parenthesis-like structure inside the cyst shows argyrophilia. The cyst is often crescent in shape.