Bony Regrowth After Deep Lateral Orbital Decompression

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To report on 2 cases of late bony regrowth with clinically apparent proptosis after deep lateral orbital decompression for thyroid orbitopathy.


A retrospective review of 2 cases identified by the authors as having late bony regrowth. The authors review the clinical, historical, radiologic, and anatomical findings and discuss the significance thereof.


Bony regrowth with bowing toward the middle cranial fossa is observed at postoperative month 8 in the first case. Cortical bone and marrow was observed to regrow at 2 years postoperatively in the second case. Both patients underwent successful repeat deep lateral orbital decompression with resolution of proptosis and clinical symptoms.


Late bony regrowth should be considered as a possible cause of recurrent proptosis after orbital decompression in thyroid eye disease.

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