Osteoma originating in the confines of the frontal sinus is designated "primary" or "primitive," as opposed to the secondary type, which invades the sinus from without. An example of such a lesion is presented in the following case: REPORT OF CASES G. A., a white man aged 22, was admitted to St. Joseph's Mercy Hospital, Ann Arbor, Mich., June 8, 1938. He had been perfectly well until about two weeks before admission, when he caught cold. The infection was mild, and there were no unusual symptoms until six days before admission, when he began to note pain over the right eye. This continued for two or three days, after which he began to notice a fulness in the right upper lid. This gradually increased, so that when the patient was admitted to the hospital the lids were entirely closed. Pain had also increased and extended over the entire forehead and
TEED RW. PRIMARY OSTEOMA OF THE FRONTAL SINUS. Arch Otolaryngol. 1941;33(2):255–292. doi:10.1001/archotol.1941.00660030258009
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