1) A gigantic front etmoidal bilateral osteoma of the eyesocket, with right predominance, slow evolution '.nd few functional disturbances, is described. 2) Total resection of the osteoma was made througb a special technique of broad transcraneal approach; eye structures were preserved with all their annexecs; visual and nasal functions were restored to normal. 3) The technique employed is described, with stresson the advantages of this broad transcraneal extradural approach.

1 ) Se describe un osteoma gigante, orbitofrontoetmoidal, bilateral, a predominancia derecha, de lenta evolución y escasos trastornos funcionales. 2) Mediante una técnica especial de amplio abordaje transcraneano, pudo efectuarse la resección total del osteoma, con conservación de•las estructuras oculares, con todos sus anexos, y restitución a la normalidad de las funciones visuales y nasales. 3') Se describe la técnica utilizada, señalando las ventajas de este amplio abordaje trañscraneano extradural.