PMC6336584_01
(A) CT: a high-density shadow on the left fibula head and surrounding soft tissue. (B) MRI: left fibula head cortical continuity was interrupted and a signal shadow 6.2 x 2.3 cm in size could be seen beside it.
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F1
In addition, patchy high-density shadows were seen in the left fibula head and surrounding soft tissue, with uneven internal density and spotted mixed density shadows (Fig. 1A). The boundary of the mass was clear and a patchy signal shadow was seen inside the mass (Fig. 1B).
The gross specimen visible to the naked eye is a large quantity of rock-like ivory with well-defined sclerotic boundaries, almost all of which is bone tissue.
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F2
The pathological features of PO are visible to the naked eye (Fig. 2) with a large quantity of rock-like ivory with well-defined scleroses, almost all of which are bone tissue.
Histopathology (hematoxylin and eosin) showed the surface of the tumor with hyperplastic fibrous tissue and a cartilage island area. In addition, chondrocyte proliferation was atypical and there was invasive growth between the peripheral striated muscle bundles.
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F3
Microscopic examination of the upper left fibula tumor (Fig. 3) showed the trabecular bone was filled with fibrous interstitium, nuclei had mild atypia, and the surface of the tumor had hyperplastic fibrous tissue and an area of cartilage island.
Follow-up imaging data.
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F4
In addition, this patient's follow-up after 4 years showed no signs of recurrence or metastasis (Fig. 4).