PMC4643469_01
Chest CT examination revealed (A) an expanding osteolytic tumor and (B) enhancement by contrast medium.
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The tumor was enhanced by contrast medium (Fig. 1).
Magnetic resonance imaging showed (A) low signal intensity on T1-weighted images, (B) high signal intensity on T2-weighted images and (C) enhancement by contrast medium.
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T1-weighted images, high signal intensity on T2-weighted images, and early-phase enhancement by contrast medium (Fig. 2). The muscles adjacent to the tumor in the left chest wall were edematous.
FDG-PET examination revealed accumulation with an SUVmax of 2.66 at the left sixth rib.
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Positron emission tomography with 2-fluoro-2-deoxy-D-glucose (18F-FDG PET) revealed a maximum standardized uptake value (SUVmax) of 2.66 (Fig. 3).
(A) Resected tumor en bloc with the left sixth rib and adjacent soft tissues and (B) cut section of the tumor.
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Macroscopic examination revealed a polycystic tumor containing hemorrhagic tissue (Fig. 4).
Hematoxylin and eosin staining (A, x20; B, x100; C, x40; D, x200). (A) Many dilated, thin-walled vessels, compatible with those of a cavernous hemangioma were present in the osseous tissue. Proliferation of capillary-sized vessels were observed in (B) the osseous tissue and (C, D) surrounding soft tissue.
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Microscopically, the tumor was composed of dilated vessels and capillary-sized vessels in the bone and adjacent soft tissues (Fig. 5).