PMC3666366_01
CT scan of the chest showing a large mass of the left lateral aspect of the seventh rib with bony matrix and sunburst central core.
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fig1
Gross examination of the mass showing a tan white hard mass involving the medullar cavity of the rib with extension to adjacent soft tissue.
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fig2
Gross examination revealed a 4.0 cm hard mass with a gray-white gritty cut surface, predominantly involving the medullary cavity of the seventh rib with extension to the adjacent sixth and eighth ribs (Figure 2).
Microscopic examination of the mass revealed moderately atypical fibroblastic cells surrounding parallel trabeculae of woven bone.
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fig3
Rare mitotic figures are noted (Figure 3).