Aneurysmal Bone Cyst of the Orbit
Utku Senola,
Kamil Karaalia,
Mahmut Akyüzb,
Tekinalp Gelenc,
Recai Tuncerb and
Ersin Lülecia
a Department of Radiology, Akdeniz University, School of Medicine, Antalya, Turkey
b Department of Neurosurgery, Akdeniz University, School of Medicine, Antalya, Turkey
c Department of Pathology, Akdeniz University, School of Medicine, Antalya, Turkey
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FIG 1. Bone destruction in the superior, lateral, and posterior walls of the right orbit.
A, Coronal CT scan obtained with bone window settings shows an orbital mass causing bone destruction and displacing the orbital structures.
B, Axial non–contrast-enhanced CT scan shows multiloculated mass with fluid-fluid levels.
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FIG 2. Mass compressing the optic nerve and ocular muscles inferomedially.
A, Axial T1-weighted MR image (562/14/2 [TR/TE/excitations]), obtained before the administration of contrast material, shows a multiloculated mass in the right frontal region, which contains fluid-fluid levels with variable signal intensity.
B, Axial contrast-enhanced T1-weighted MR image (562/14/2) shows enhancement of the cyst walls.
C, Coronal T2-weighted MR image (4000/120/3) shows displacement of the optic nerve and ocular muscles by the mass.
D, Sagittal T2-weighted MR image (4000/120/3) shows multiple small cysts (diverticula) projecting from larger cysts.
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FIG 3. Histologic specimen shows multiple giant cells and bony spicula within the walls of the cystic spaces containing erythrocytes (hematoxylin-eosin stain, magnification x20).
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