Fibro-osseous lesions of the maxillo-ethmoid complex with orbital involvement.

Fibro-osseous lesions involving the maxillo-ethmoid complex are rare. Extensive lesions leading to proptosis are rare still. We report here 22 cases of fibro-osseous lesions with orbital involvement. CT scan was the mainstay of radiological investigation. Transfacial excision was done in all cases, except three which necessitated a cranio-facial resection. Surgery resulted in significant reduction of proptosis and improved cosmesis in all cases. In three instances, a sliver of the tumor tissue was left behind due to its proximity to the dura or optic nerve. Two of these cases however went on to develop subsequent visual loss secondary to disease progression. Six cases necessitated revision surgery for residual or recurrent lesion.Disease extension to the proximity of vital structures should be excised as continuing tumor growth may prove unsafe.