巨大なる前頭洞骨腫の1例

　I．緒言

　副鼻腔骨腫は本邦に於いても50数例の報告があり，それ程稀な疾患ではないが，前頭洞に発生せる骨腫の報告は比較的少ない。ここに最近経験した前頭洞に発生せる巨大なる骨腫の症例について臨床的所見を記載し，先人の症例に追加すると共に文献的考按を行い，特に本邦にて報告された12例の前頭洞骨腫との比較を行つて見たい。

A case of a large osteoma of frontal sinus is reported with a review of literature on other cases of similar nature. The patient was a girl, aged 15, who complained of no symptom excepting for a protrusion of the frontal region with a slight sensation of pre-ssure in that area. The tumor was revealed by X-ray examination : and by operation it was found to be arising from the base of frontal sinus pushing the sinus mucous me-mbrane downwards causing exposure of dura by gradual destruction of the posterior wall of the sinus cavity. Protrusion of the tumor mass was also found to be extending anteri-orly but its effect on the ocular fossa and ethmoidal cells were not seen. After the operation patient made an uneventful reco-very.

The tumor weighed 40 grams and it was composed chiefly of eburnated osteomatous tissue with a very small portion spongioid in nature.