Primary maxillary chondrosarcoma: A case report

Figure 1 The tumor and orthopantomography. A: A tumor mass affecting the palatal and vestibular regions of the left maxilla was observed. The palatal mucosa was normochromic and had a retained canine. In the vestibular sulcus, there was multilobulated tumor mass with a yellowish and telangiectatic surface; B: Orthopantomography showing a poorly defined radiolucent zone apparently associated with a canine retained at the level of the left upper premolars.

Figure 2 Computed tomography with 3-dimensional reconstruction. A, B: Computed axial tomograph; C, D: Affected vestibular and palatal and cortical bones. Size, delimitation, and degree of destruction of affected bone tissue.

Figure 3 Hematoxylin and eosin stain. A: 50 ×; B: 100 ×; Cartilaginous neoplasia with well-vascularized lobular pattern; C: 100 ×; D: 400 ×. Proliferation of hyperchromatic, binucleated, and pleomorphic chondrocytes in large and irregular lagoons.

Figure 4 Hematoxylin and eosin stain. A, B: Pleomorphic chondrocytes with nuclear positivity for S-100 (400 ×); C, D: Moderate reaction to Ki-67 (400 ×); proliferative activity is observed mainly in undifferentiated small cells and some atypical chondrocytes.