Post-cricoid cancer（輪状軟骨後部癌）に就て

　緒言

　Post-cricoid caneerと言うのは食道入口部の直上前壁即ち輪状軟骨後面に来る癌腫で，正確に言えば下咽頭癌の1型であるが，屡々食道入口部の方向に増殖するため食道癌として取り扱われ，又喉頭内に蔓延するため喉頭癌としても取り扱われる，即ち咽頭，喉頭，食道のGrenzgebietに属する癌腫である．本症に関しては英国の1ogan Turnerが1913年及び1920年のJ. Laryng. a. Otol. に詳しくその臨牀的重要性や特異性に就て述べており，其の他にも英米では症例報告が散見されるが，我が国では殆んど注意が払われていない私は教室の喉頭内摘百例の内に2例の本症例を認めた．本症は食道癌，喉頭癌と異なる臨床的特徴を有し且つ喉頭全摘出術々式に依つて完全に摘出する事が出来ると言う点から，今後一層專門家の注意を惹く疾患であろうと考え茲に報告する．

IWAMOTO says that, ni thir country, very little attention is given to post-cricoid carcinoma, malig-nant growth which occur on the .posterior surfsce of the annular cartilage of the larynx, the sympto-ms of which differ widely from those which are elicited by symptoms of which differ widely from those which are elicited by esophageal or laryngeal cancers. The author reports 2 cases of this type of cancer. Despite successful laryngectomy both cases died because of the lete stage in which the patients came to Operation. In view of the fact that the disease is highly malignant with a great incidence of metastasis to cervical lymph glands rather early in its course. early reoognition and proper surgical intervention at the earliest possible stage of the disease ase highly important towards its treatment, for the disease is curable if the operation is performed at the proper time.