The term osteoma is applied to tumors composed of bone and should be limited to true neoplasms. The tumors thus designated may be of 2 types: an ivory-like structure and a soft cancellous one, the former being the more common. True osteoma must be differentiated from the exostosis, the enostosis and the hyper-ostosis, and the criteria by which this can best be done are found in clinical features.
Osteoma of an accessory sinus of the nose is uncommon in my experience (limited to a single case). Many authors have stated that it is relatively common; no one of them, however, has reported a large series of cases.Osteoma of the frontal sinus occurs most frequently. Arnold1 in 1873 reported 2 cases and described his surgical treatment. In 1938 Malan2 collected 458 cases of osteoma of the accessory sinuses of the nose; the involved areas were the frontal sinus in
JOHNSTON WH. OSTEOMA OF THE FRONTAL SINUS: REPORT OF A CASE. Arch Otolaryngol. 1943;38(4):318–323. doi:10.1001/archotol.1943.00670040332002
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