Aneurysmal bone cysts are uncommon nonneoplastic lesions that occur most frequently in long bones, vertebrae, and the pelvis. Fewer than 1% of aneurysmal bone cysts involve the skull and only 17 cases have been reported with orbital involvement. Of these, 11 involved the orbital roof and only two involved the medial orbit.1 We present a case of an aneurysmal bone cyst involving the medial orbital wall in an 11-month-old girl.
Report of a Case.
—An 11-month-old girl presented with a 2-week history of rapidly progressive proptosis of the right eye, mild right facial swelling, right epistaxis, and difficulty breathing through the right nostril. There was no history of trauma. She had a firm, palpable mass in the right medial canthus and mild limitation of extraocular motility on the right side. The results of pupillary and funduscopic examinations were normal. There was a fleshy mass in the right nasal cavity.
Patel BC, Sabir DI, Flaharty PM, Anderson RL. Aneurysmal Bone Cyst of the Orbit and Ethmoid Sinus. Arch Ophthalmol. 1993;111(5):586-587. doi:10.1001/archopht.1993.01090050020015