1. 1.Takimoto T, Itoh M, Katoh H : Small Ethmoid Osteoma Causing Headache by Compressing the Anterior Ethmoid Nerve. Practica Oto-Rhino-Laryngologica, 85 : 10 ; 1599-1602, 1992.
2. 2.Knapp H : Subperiosteal enucleation of an ivory exostosis of the frontal sinus, extending into the nasal and orbital cavities : healing by first intention. Arch Ophthalmol, 9 : 464-470, 1880.
3. 3.Oto T, Utida Y, Horiuti H, Sugita T, Yoshioka K, Hayakawa K : A case of huge ethmoidal sinus osteoma with blurred vision. Oto-Rhino-Laryngology, Tokyo, 22 : 577-582, 1979.
4. 4.Oya T, Sato S, Hattori M, Tada E, Mizuno S, Koide S, Ouchi : Three cases of frontal sinus osteoma. Oto-Rhino-Laryngology, Tokyo, 39 : 837-843, 1967.
5. 5.Chidrey JH : Osteoma of sinuses, the frontal and sphenoid bone : report of fifteen cases. Arch Otolaryng, 30 : 63-72, 1939.