PMC3861589_01
Computed tomography scan showing an irregularly shaped 12x10x10-cm expansion mass beside the 7th thoracic vertebra. Disappearance of the cortex and lytic changes in the 7th ribs are demonstrated. Atelectasis of the right lower lobe is also evident.
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Atelectasis of the right lower lobe and pleural effusion were also observed in the CT (Fig. 1).
(A) Profile of the aneurysmal bone cyst, which originated from the 7th rib, during surgery. (B) Macroscopic appearance of the resected specimen.
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Numerous blood-filled cysts protruded from the surface of the mass, and an abundant blood supply was observed in the margin of the tumor (Fig. 2).
Hemorrhagic areas within a cystic space (hematoxylin and eosin staining; magnification, x400).
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All these pathological findings were consistent with those of an ABC (Fig. 3).