Lobulated; mildly cellular lobules of polygonal cells
Pale eosinophilic cytoplasm
Round-ovoid hyperchromatic nuclei with mild pleomorphism and occasional bi-nucleation; inconspicuous mitotic activity
Abundant hyaline cartilage matrix; areas of collagen fibres
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
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