title: Osteoma of the ethmoid and lacrimal bone.
abstract: The true osteoma is a benign tumour, which mainly occurs in the bones and cavities of the middle third of the face. This article discribes a case of a true osteoma of considerable size arising from the junction of the lacrimal and ethmoid bones of a 19-years-old boy causing limitation of the field of vision.
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000473:pathology*; D005004:Ethmoid Bone / Q000473:pathology*; D006801:Humans; D008297:Male; D009915:Orbit / Q000473:pathology*; D010016:Osteoma / Q000473:pathology*