顔面神経管破壊を伴つた外耳道軟骨腫の1例

FACIAL NERVE INVOLVEMENT IN CHONDROMA OF THE EXTERNAL AUDITORY MEATUS

　I．はじめに

　耳に発生する軟骨腫は，成書によると，外耳の軟骨部分より発生し得るが，きわめて稀で特に記載の要なしとしてある。多くの場合，外耳道の腫瘍以外は無症状であるため，臨床上問題とならず，したがつて報告例もほとんど見当らない。

　われわれは最近，顔面神経麻痺を初発症状として発症した外耳道軟骨腫で，病理組織上は良性腫瘍と診断されたが，臨床的な骨破壊性からは局所悪性化を疑わせる1例を経験したので報告し，諸賢のご批判を仰ぎたいと思う。

　It has been generally considered that the chondroma of the external auditory meatus requires no special attention.

　The authors report an unusual case of chondroma of the ear which was histologically diagnosed as benign but clinically, with facial nerve involvement the growth suggested malignancy.

　The patient a man, aged 50, complained of tumor on the right ear and facial paralysis of several years standing.

　The operation revealed extensive bony involvement of the chondroma which extended to the Fallopian canal and the mastoid cavity posteriorly and to the bulbus venae jugularis inferiorly.

　Yet, histological examination of the chondroma showed no malignancy but, the possibility of localized malignancy still remains from the clinical point of view.