the latter included 50 patients with benign tumors ( osteoblastoclastomas , chondroblastomas , chondromas , non-osteogenic fibromas ) and 32 patients with malignant tumors ( chondro- and osteosarcomas , ewing sarcoma , malignant osteoblastoclastomas ) .
C0029463
osteosarcomas
C0553580
ewing