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Conventional chondrosarcoma and histological grades. The higher-grade tumors are more hypercellular, with increasing mitotic activity, cytological and nuclear atypia, a matrix is changing from hyaline to more mucoid or myxoid (white arrow: binucleation of chondrocytes, black arrow: large, highly atypical chondrocyte; hematoxylin and eosin staining (HE), magnification: upper row 100×, bottom row 200× and 600×). Photos by Anna Szumera-Ciećkiewicz.
