PMC6556241_01
Left hand radiographs with illustrative zoom.
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fig1
Nuclear magnetic resonance imaging (NMRI). (a) Axial fat-suppressed T2-weighted NMRI. (b, c) Respectively, axial and coronal, gadolinium-enhanced T1-weighted NMRI.
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fig2
Figure 2(a) (axial fat-suppressed T2-weighted NMRI) shows a nodular low-signal intensity lesion, surrounded by a high-signal intensity reactive edema. Figures 2(b) and 2(c) (respectively, axial and coronal, gadolinium-enhanced T1-weighted NMRI) bring to light a strong enhancement of the tumor and the medullary bone, in addition of the adjacent soft tissue.
Operative specimen with its intraoperative radiograph.
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fig3
Then, the specimen was sent for histological examination.  Figure 3 reveals the operative specimen with its intraoperative radiograph.
Histological examination (magnification factor: (a) x10, (b) x20, (c) x40, (d) x100, and (e) x200). (a) OO separated from the normal bone by connective tissue. (e) Osteoid and woven bone with interconnected trabeculae and a background and rim of highly vascularized connective tissue.
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fig4
It shows, as referred to in Figure 4, a condensation zone constituted of irregular trabecula of the bone, surrounded in periphery by a high vascular connective tissue, equally containing disordered trabecula of the bone.
Postoperative radiographs.
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fig5
The X-rays have shown total excision and a respected joint space.  Figure 5 points out postoperative radiographs.