聽器癌腫に就いて

　聽器にみられる癌腫は其の発生頻度が非常に低くBezoldは2万人の耳疾患中癌腫は4例に過ぎず，久保教授は25年間に7152名の耳疾患中癌腫は10例であつたと述べておられる．然もこの数字は耳介に発生した癌も含んでいるもので，聽器癌腫の多くは耳介にみられるもので，外耳道，中耳，内耳に発生する癌腫は遙かに少い．Brodenによれば63例の聽器悪性腫瘍中，耳介に発生するものは84％，外耳道のものが14％，中耳に発生するものが2％であると云う．

　耳介の癌腫を除外すれば，外耳道，中耳，内耳，に発生した癌腫は何れも主として側頭骨質を侵すのを常とするから，其の症候は何れも類似しているのでKretschmann，Jebrowskiはこれを側頭骨癌腫と総称し又Jeroni，Gelbeは聽器癌腫と総称している．

　HARADA reports a case of epithelioma which occurred in the external aural canal of a patient, a woman agea 62, who revealed a history of havixig suffered the affectioe of chronic, suppura live otitis media since her chiladhood and whose two brothers died of gastric carcinoma. The examination of the ear showed a tumor, which began to make its appearance 7 years previously as a small growth, deeply situated in the external canal; microscopic examinatioh proved the growth to be an epithelioma. The operation revealed the malignancy arising from the posterior wall of the external canal to be invading and occupying the entire middle ear cavity. In postoperative course the patient showed somewhat of an improvement with use of penicillin, radium irradiation and intravenous fluids but, soon, she developed symptoms of recurrence of mallgnancy with facial palsy and continuous malodorous ear discharges and, died. about 2 months following the surgical intervention.