PMC7148584_01
(a, b) Radiography and three-dimensional computed tomography (3D-CT) reconstruction showed an osteolytic lesion of the right ilium and acetabulum with cortical destruction, marginal sclerosis, slight pseudotrabeculation, and bone expansion (arrowhead). (a) Radiograph. (b) 3D-CT. (c, d) Magnetic resonance imaging revealed a massive tumor lesion throughout the right ilium; T2-weighted images of the ilium lesion showed low-signal intensity compared to muscle (arrowhead). (c) Axial view. (d) Coronal view.
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Radiography and computed tomography (CT) showed an osteolytic lesion of the right ilium and acetabulum with cortical destruction, marginal sclerosis, slight pseudotrabeculation, and bone expansion (Figures 1(a) and 1(b)). Magnetic resonance imaging (MRI) revealed a massive tumor lesion throughout the right ilium; T1- and T2-weighted images of the iliac lesion showed low-signal intensity compared to the muscle, indicative of fibrous tumor (Figures 1(c) and 1(d)).
(a) The hematoxylin and eosin staining of specimen from the ilium showed the proliferation of spindle cells in an abundant collagenous matrix and involvement of tumor cells in the bone cortex, inducing bone destruction. (b, c) Immunohistochemically, the specimen was positive for cytoplasmic vimentin and smooth muscle action (SMA). (b) Vimentin. (c) SMA.
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Open biopsy from the right ilium showed the proliferation of spindle cells in an abundant collagenous matrix and involvement of tumor cells in the bone cortex, inducing bone destruction (Figure 2(a)). Furthermore, immunohistochemically, the specimen was positive for cytoplasmic vimentin and smooth muscle actin (SMA), suggesting a diagnosis of DFB (Figures 2(b) and 2(c)).
(a, b) Coronal view of computed tomography image at 10 years after the first visit revealed a partially sclerotic lesion of the ilium and acetabulum. (a) At first visit. (b) Ten years after the first visit.
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CT at 10 years after the first visit revealed a partially sclerotic lesion of the ilium and acetabulum (Figures 3(a) and 3(b)).