PMC7110299_01
Expansive cystic bone formation in the right orbital roof, with peripheral enhancement through contrast with thin septations, measuring 3.3 x 4.0 x 2.8 cm (LL x AP x CC). It presents clear limits, with a "frosted glass" aspect in the bone portion in its periphery, especially in its inferomedial aspect. (a-c) Magnetic resonance imaging images, axial, sagittal, and coronal view, respectively. (d and e) Computed tomography images, coronal and axial view (f) there is consequent degree I proptosis of this side and displacement of the optic nerve.
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F1
Cystic walls were enhanced after injection of gadolinium [Figure 1].
Surgical images: (a) frontopterional approach, (b) bone exposure, (c and d) intraoperative aspect of the ossifying bone, (e and f) postoperative results: improvement of exophthalmos and paralysis of the lateral rectus muscle.
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F2
The postoperative follow- up was uneventful, with reduction of the proptosis [Figure 2].
Juvenile psammomatoid: (a and b) hematoxylin and eosin analysis: disconnected spicules of irregularly shaped bone often with hemorrhage and occasional giant cells; prominent osteoblast lining may be seen, as well as occasional partially lamellar bone with numerous round psammoma-like calcified bodies are identified. (c-e) Immunohistochemistry analysis: the markers performed are only for a differential with meningothelial/neural sheath tumors. The three are negative: progesterone receptor, epithelial membrane antigen, and S-100.
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F3
Figure 3 shows the pathology findings.