Orbital extension of a frontal sinus osteoma in a thirteen-year-old girl

Osteomas are uncommon, slow-growing, benign osteogenic neoplasms that arise most frequently in the craniofacial skeleton.(1,2) Osteoma is the most com mon benign tumor of the nose and paranasal sinuses and the most common neop lasm of the frontal sinus.(3-5) Paranasal sinus osteomas originate in the s inus wall, fill the lumen with well-defined mature osseous tissue, and occa sionally extend into the orbit where they give rise to orbital signs and sy mptoms. Osteomas most commonly become symptomatic in the second to fifth de cade in life, but orbital involvement has rarely been reported in patients aged 18 years and younger.(2,6-10) We report a case of a frontal sinus oste oma with orbital extension in a 13-year-old girl.