Table 1: Plain radiograph findings by histologic subtype.

Mineralization Soft-tissue mass Exostosis Tumor luminance   Present <50% >50% Bimorphic Present Extracompartmental Cortical obliteration Present Corticomedullary continuity MFH-like subtype 9 2 7 4 10 10 8 7 1 103.9 OSA-like subtype 5 3 2 3 5 5 4 3 2 90.4 SCS-like subtype 2 1 1 1 2 2 1 1 0 67.6

Abbreviations: malignant fibrous histiocytoma (MFH); osteosarcoma (OSA); spindle-cell sarcoma (SCS).