A rare case report of aneurysmal bone cyst involving the roof of the orbit

Abstract

Aneurysmal bone cyst (ABC) is a benign, tumor like, multi-cystic vascular lesion that causes destruction of the cortical bone. It usually involves the metaphysis of long bones and spine (posterior elements). ABC arising in the orbit constitutes less than 0.25% of all reported cases. We report a 5-year-old girl who presented with painless right sided proptosis without any visual disturbance, which was gradual in onset. Contrast enhanced computed tomography and magnetic resonance imaging scans of the orbit were suggestive of an expansile bony lytic lesion in the roof of the right orbit. Frontal craniotomy followed by the supra-orbital osteotomy was carried out. The entire tumor-like mass was removed piece-meal. Histopathological diagnosis was “a solid variant of ABC of the orbital roof.” Post-operative course was satisfactory and the patients eye symptoms improved.