The images show the characteristic features:

• Islands of cells with palisaded nuclei that have reverse polarization.
  • Reverse polarization of nuclei = nuclei distant from the basement membrane/nuclei at pole opposite of basement membrane.
  • Palisaded nuclei = picket fence appearance; columnar-shaped nuclei with long axis perpendicular to the basement membrane.
• Subnuclear vacuolization in palisading cell - vacuoles at the basement membrane aspect.
• Loose stroma around the islands of cells.
• Star-like cells at the centre of the islands of cells (stellate reticulum).

• 
  Low mag.
• 
  Intermed. mag.
• 
  High mag.
• 
  Very high mag.