Archives of the AFIP -- RadioGraphics

Figure Legend | Panel A | Panel B | Panel C | Panel D

Figure 13: Parosteal osteosarcoma of the posterior distal femur in a 32-year-old man. Lateral radiograph (Panel A), axial CT scan (Panel B), and radiograph (Panel C) and photograph (Panel D) of the sagittally sectioned specimen show a lobulated, extensively ossified mass that is largely juxtacortical (curved arrows), with a cleavage plane superiorly (straight arrow), nonmineralized component (small arrowheads), and invasion (back growth) into the medullary canal (large arrowhead). At histologic examination, the soft-tissue component represented a higher-grade focus of the tumor.

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