PMC8492244_01
(a) Computed tomography (CT) image of the tumor showing cortical destruction and calcification in the 11th rib. (b) The tumor slowly grew at three-year intervals. (c) Calcification resembled the ring and arc calcifications observed in chondrosarcoma on CT.
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fig1
The lesion was incidentally detected during treatment for pyogenic spondylitis and infective endocarditis on computed tomography (CT) (Figures 1(a)-1(c)).
Magnetic resonance imaging showing the tumor in the 11th rib. (a) The mass was isointense relative to skeletal muscle on T1-weighted images. (b) The mass was hyperintense relative to skeletal muscle on T2-weighted images. (c) The mass showed enhancement on gadolinium-enhanced, fat-saturation T1-weighted images.
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fig2
Magnetic resonance imaging (MRI) demonstrated a well-circumscribed, lobulated mass, which appeared isointense relative to skeletal muscle on T1-weighted images, presented high-signal intensity on T2-weighted images and enhancement on gadolinium-enhanced T1-weighted images (Figures 2(a)-2(c)).
(a) Gross appearance of the resected specimen. Numerous vessels were identified. (b) The histopathology of the lesion showed that the tumor was comprised of numerous irregular, dilated, and thin-walled vessels lined with a single layer of flattened endothelial cells, without cytologic atypia, consistent with the findings of hemangioma. The coarse trabecular bones were observed.
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fig3
Pathological findings were consistent with the features of hemangioma of bone (Figures 3(a) and 3(b)).
PMC8492244_02
Computed tomography showing a tumor with cortical destruction and honeycomb-like calcifications in the 4th rib.
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fig4
X-ray during a regular checkup. X-ray and CT imaging showed a mass with honeycomb-like calcifications in the 4th rib (Figure 4).
Magnetic resonance imaging showing the tumor in the 4th rib. (a) The mass was hyperintense on T2-weighted images. (b) The mass showed enhancement on gadolinium-enhanced, fat-saturation T1-weighted images.
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fig5
MRI demonstrated a corresponding mass, which appeared isointense relative to skeletal muscle on T1-weighted images, with high-signal intensity on T2-weighted images, and enhancement on gadolinium-enhanced T1-weighted images (Figures 5(a) and 5(b)).