case_images: PMC2685995_01
case_images: Bony mass in the left maxilla and extended to the right temporal bone.
case_images: JO2009-876138.001.jpg
case_images: PMC2685995_01_JO2009-876138.001.jpg
case_images: fig1
case_images: Computed tomography (CT) demonstrated a large bony mass in the right maxilla that extended into temporal bone (Figure 1).
case_images: Section from the biopsy specimen
  showing a chondroblastic osteosarcoma which contains dominating chondroid
  substance (right side) and osteoid trabeculae derived from neoplastic cells
  (center) (He x 185).
case_images: JO2009-876138.002.jpg
case_images: PMC2685995_01_JO2009-876138.002.jpg
case_images: fig2
case_images: Immunohistochemistery showed diffuse positivity to vimentin and S100 protein antibodies (Figure 2).