In a survey of the literature inclusive of 1926, Harris1 reported a total of 117 cases of osteoma of the frontal sinus. I have counted 20 additional cases of osteoma distributed as follows: frontal sinus, 8 cases; orbit, 4 cases; ethmoid, 3 cases; sphenoid, 2 cases, and frontal, ethmoid and orbit, 3 cases.
Osteomas appear to arise from the periosteum lining the sinus. It is doubtful whether trauma plays a rôle. However, there are many instances in which the history of an injury is definite. Chronic inflammation of the sinuses has been suggested as a cause.
Osteomas are usually composed of a dense, ivory-like periphery and a soft cancellous center and are attached to the wall by a pedicle. There are three types: (1) eburnated, (2) spongiose and (3) mixed. Structurally, they differ from the usual bone in that the haversian canals and lacunae do not conform to any
PARSELL LA. OSTEOMA OF THE FRONTAL SINUS. Arch Otolaryngol. 1932;16(6):863–865. doi:10.1001/archotol.1932.00630040878009
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