title: Ultrastructural features of a malignant giant cell tumor of bone with areas of osteogenic sarcoma.
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis / Q000648:ultrastructure*; D005260:Female; D005870:Giant Cell Tumors / Q000175:diagnosis / Q000648:ultrastructure*; D006801:Humans; D007717:Knee; D012516:Osteosarcoma / Q000175:diagnosis / Q000648:ultrastructure*; D011247:Pregnancy