Chondrosarcoma, grade I / Atypical cartilaginous tumour

Chondrosarcoma, grade I

  • Lobulated; infiltrative; mildly cellular lobules of stellate-polygonal cells

  • Pale eosinophilic cytoplasm

  • Round-ovoid hyperchromatic nuclei with mild pleomorphism; inconspicuous mitotic activity

  • Abundant hyaline cartilage matrix; areas of myxoid degeneration; patchy necrosis

Chondrosarcoma, grade I

  • Lobulated; infiltrative; hypocellular lobules of stellate-polygonal cells

  • Pale eosinophilic cytoplasm

  • Round-ovoid hyperchromatic nuclei with mild pleomorphism; inconspicuous mitotic activity

  • Abundant hyaline cartilage matrix; patchy necrosis