巨大前頭洞骨腫の1例

A case of a large frontal sinus osteoma

はじめに

　骨腫は緩徐な進行を示す良性腫瘍で，鼻副鼻腔に発生した場合，発生部位と進展様式によって副鼻腔炎，神経障害，髄膜炎などをきたしうる。今回，両側前頭洞に及ぶ巨大な前頭洞骨腫に対して，脳神経外科と合同で，頭皮環状切開による鼻外からのアプローチと内視鏡下副鼻腔手術（ESS）を併用し腫瘍を摘出した症例を経験したので，文献的考察を加え報告する。

　An osteoma is a benign, slow-growing bone-forming tumor that primarily consists of well-differentiated mature, compact or cancellous bone. Here, we report a case of a giant frontal sinus osteoma that was successfully resected using a combination of intranasal and extranasal approaches. The tumor was attached to the nasal bone. Complete removal would significantly affected the patient's appearance；therefore, we debulked the tumor as much as possible using a drill, and the nasal bone was not manipulated. The patient's nasal obstruction and headache improved postoperatively. This combined approach may be effective for treatment of large frontal sinus osteomas.