OSTEOMA OF THE FRONTAL, THE MAXILLARY AND THE SPHENOID SINUSES: WITH REPORT OF CASES

In a discussion of osteoma of the frontal sinus, many things are to be considered. Because of its comparative rarity, the theories concerning the origin and the incidences of osteoma of the frontal sinus as compared with other tumors must be considered first. INCIDENCE Statistics on the incidence are so variable that an accurate estimate can be only approximate. In general, about 215 cases of either a single osteoma or a multiple osteoma have been reported from all sources during the last 175 years. Hermann Knapp1found four osteomas of the orbit which had their origin in the paranasal sinus in 56,000 cases. Then he noted that this tumor occurred more frequently in the floor of the frontal sinus than in any of the paranasal sinuses. Andrews compiled eight cases of osteoma of the orbit in 430,000 cases of eye disease. Bornhaupt2reviewed the literature and