Case 96- Discussion

Uploaded: 2007-09-17, Updated: 2011-01-10
 

 
CD99 Chromogranin
NSE Synaptophysis

I

  

IMMUNOHISTOCHEMISTRY

   
  • Pan cytokeratin (AE1/3): Negative
  • CK 8/18: Negative
  • CK7: Negative
  • CK19: Negative
  • 34BE12: Negative
  • CK20: Negative 
  • LCA: Negative
  • EBV: Negative
  • TTF-1: Negative
  • S100: Negative
  • NF: Negative
  • Synapthophysis: Positive
  • Chromogranin: Positive
  • NSE: Positive
  • CD57 (Leu-7): Positive
  • CD99: Negative
  • GFAP: Negative
  • Vimentin: Negative
  • Myogenin: Negative

 

Esthesioneuroblastoma (Olfactory Neuroblastoma)

  • Lobular or nested, prominent microvasculature, round blue cells, minimal pleomorphism, Homer Wright rosettes, neuropil present

  • Tumor cells positive for synaptophysin and chromogranin A, but CK negative or focally positive

  • Sustentacular cells positive for S100+ in ,

  • Good prognosis if confined to nasal cavity

  • DDX: SNUC, CK diffusely positive