Periosteal chondrosarcoma
Chondrosarcoma, grade I
Chondrosarcoma, grade I
Lobulated; mildly cellular lobules of polygonal cells
Pale eosinophilic cytoplasm
Round-ovoid hyperchromatic nuclei with occasional bi-nucleation and mild pleomorphism; inconspicuous mitotic activity
Abundant hyaline cartilage matrix
Chondrosarcoma, grade I
Chondrosarcoma, grade I
Lobulated; infiltrative; mildly cellular lobules of stellate-polygonal cells
Pale eosinophilic cytoplasm
Round-ovoid nuclei with macronucleoli and mild pleomorphism; inconspicuous mitotic activity
Abundant hyaline cartilage matrix; patchy necrosis