Multinodular; circumscribed
Clusters of polygonal-stellate cells with pale eosinophilic cytoplasm, set within lacunae
Ovoid hyperchromatic nuclei with mild atypia and occasional bi-nucleation
Abundant hyaline matrix with enchondral calcification and metaplastic bone
Multinodular; circumscribed
Clusters of polygonal-stellate cells with pale eosinophilic cytoplasm, set within lacunae
Ovoid hyperchromatic nuclei with mild atypia and occasional bi-nucleation
Abundant hyaline cartilage matrix
RNA-Seq: FN1::ACVR2A gene fusion
Multinodular; circumscribed
Clusters of polygonal-stellate cells with pale eosinophilic cytoplasm, set within lacunae
Ovoid hyperchromatic nuclei with mild atypia and occasional bi-nucleation
Abundant hyaline cartilage matrix
Multilobulated; circumscribed
Clusters of polygonal cells with pale eosinophilic cytoplasm, set within lacunae
Ovoid hyperchromatic nuclei with mild atypia and occasional bi-nucleation
Abundant hyaline cartilage matrix with nodules separated by fibrous connective tissue
Multilobulated; circumscribed
Clusters of polygonal cells with pale amphophilic cytoplasm, set within lacunae
Hyperchromatic round nuclei with mild atypia and occasional bi-nucleation
Abundant hyaline cartilage matrix
Multinodular; circumscribed
Clusters of polygonal-stellate cells with pale eosinophilic cytoplasm, set within lacunae
Ovoid hyperchromatic nuclei with mild atypia and occasional bi-nucleation
Abundant hyaline cartilage matrix with focal enchondral calcification
Multinodular; circumscribed
Clusters of polygonal-stellate cells with pale eosinophilic cytoplasm, set within lacunae
Ovoid hyperchromatic nuclei with mild atypia and occasional bi-nucleation
Hyaline matrix with enchondral calcification and metaplastic bone